PCs aren't just workhorses for the office, they can be a useful and fun tool for home or work image and video production, too. Here's one such tool that runs in the Windows OS, Dynamic Auto-Painter. I've taken a screenshot video as the application does its magical work...
Monday, May 21, 2012
Tuesday, March 13, 2012
IBM's new 'Holey' optical transceiver may be full of holes but is rather quick
I used to sell this sort of stuff in the mid-80s... suffice to say we are getting faster and better all the time at transferring data quickly and in quantity within a chipset. The road blocks may come about when the data tries to leave the boundaries of the chipset, of course...
IBM unveils one trillion bit-per-second optical chip
IBM unveils one trillion bit-per-second optical chip
Last Thursday at the Optical Fiber Communication Conference in Los Angeles, a team from IBM presented research on their wonderfully-named "Holey Optochip." The prototype chipset is the first parallel optical transceiver that is able to transfer one trillion bits (or one terabit) of information per second. To put that in perspective, IBM states that 500 high-def movies could be downloaded in one second at that speed, while the entire U.S. Library of Congress web archive could be downloaded in an hour.
Wednesday, July 13, 2011
Check these other blogs out!
I've been a bit slack here with my posting but there's been a lot more activity on my other blogs... please check 'em out!
Addicted2wheels - bike racing for everyone
Offline - my take on the planet and its politics
Dopage - all the dope on the dopes who dope, allegedly
Secrets of a Sydney Past - personal photos and recollections of Sydney's history
Central Coast Imagery - my photography blog
Musical Must-knows - software and gadgets for the electronic audio artiste
My Alfa Blog - as in rust-free Italians
My PC Help Blog - as in fixing hardware and software
Addicted2wheels - bike racing for everyone
Offline - my take on the planet and its politics
Dopage - all the dope on the dopes who dope, allegedly
Secrets of a Sydney Past - personal photos and recollections of Sydney's history
Central Coast Imagery - my photography blog
Musical Must-knows - software and gadgets for the electronic audio artiste
My Alfa Blog - as in rust-free Italians
My PC Help Blog - as in fixing hardware and software
Thursday, May 26, 2011
The dreaded Blue screen of death - a driver crash. Or debugging the Windows BSOD with WinDbg
Well it happens. There you are working on something important and wham, a blue screen of death appears. Or BSOD for short. You wait patiently as it writes "stuff" somewhere and as the seconds tick by you just hope it reboots. Then you hope you can recover some of your work. (Save often - and in multiple places if you can!)
Welcome to Windows. Hey, you'll get used to it. And don't imagine something similar doesn't occasionally happen in alternative operating systems like UNIX or the recent UNIX-derived Apple OS. Anyone who's worked on Apple hardware for example knows that whilst "closed shop" or proprietary designs can keep potentially clashing hardware and software designs under a tighter reign, when they do break it's often far less simple - and more expensive - to get to the root cause. And it's the very openness of the original "IBM compatible" and later Intel and Microsoft hardware/software partnership that both rewards us with plentiful alternatives at lower cost and delivers us into the looser, vaguer world of mismatched versions and uncontrolled design. But enough of that. How do you fix it?
Well the BSOD usually gives you a clue. I just got one - and it blamed "NV4_disp.dll". You don't have to be Einstein to realise that "NV" is probably NVIDIA and "disp" is probably "display". It's your smoking gun, usually.
The "dll" bit is a Dynamic Link Library file, simply a file that provides one or more particular functions and/or some data for a given application. Generally speaking - and I'll use NV4_disp.dll as my example here - it's a device driver of some sort. So in this example NV4_disp.dll is happily driving the screen (or monitor or display if you like) and we call it the video driver because having many names for simple things is cool. Then you start up a new or recently updated video player (like I just updated Real because it asked me to) and it innocently makes a call upon NV4_disp.dll that just doesn't make complete sense. Perhaps your version of NV4_disp.dll is (like mine) 6 months old or more and is subtly different from "today's" standard. Somewhere along the road an error crops up that doesn't get handled properly and Windows itself steps in to save us all from disaster - by shutting down. Extreme, I know, but probably safer than letting things go from bad to worse.
The best fix here is simply to update NV4_disp.dll. Whatever the BSOD identifies is usually the culprit, unless it simply can't work out what broke first. In which case you need to dig deeper (see the end of this story for more clues).
But how do you update a video driver? Or any other driver for that matter? Well the Internet can be your friend here - just search for say "NV4_disp.dll update" and choose the most likely - like the NVIDIA website. They have a tool there that searches automagically for the right driver. If that doesn't work (it didn't for me and my Windows XP SP3 machine) then go to your control panel and open the NVIDIA control panel. Look for "system information" and bingo, you have your driver data.
Plug that info in manually and it'll come up with the latest driver. Download and install that. Remember it's safer to download from the manufacturer directly, if you can. Run a virus check on the file just to be safe.
Hopefully that'll fix it.
But what if you need more clues, Sherlock?
Well if the BSOD is clueless, try "WhoCrashed", a program by Resplendence.com that does the hard yards for you - and for free if you are a home user. (Search the Internet for it but remember to be careful who you download from and run a virus scan on the file.) WhoCrashed may ask where your source files are - and these are your "minidump" files. Minidump is simply a Windows repository for crash-logging files and is usually found under C:\WINDOWS\Minidump or similar.
I've rarely found Minidump turned off but some "tune up" software may turn it off to save space (not that it would save much). If turned off, turn it on (you'll find it via the "Help and Support Centre" in Windows, simply click on "Use tools.. ..to diagnose problems" then "System Restore" and "System Restore settings". Phew. Then open "Advanced" and "Startup and recovery" then "Settings". Still with me? Inside settings you should have a tick in "write an event to the system log" and "Small Memory dump" as the address written to... it will default now to %SystemRoot%\Minidump. Easy. Press OK to save and exit.)
WhoCrashed will spit out a report. Read it, it will probably help to determine what, or perhaps who, actually crashed. If it identifies specific hardware or software then follow that trail with updates, reinstalls or rollbacks as needed. Search on the Internet for more opinons if you like, too. Often there are multiple solutions as well as countless false trails.
And if you prefer to use the genuine Microsoft debugger it's called WinDbg and it comes with the genuine Windows set of debugging tools, downloadable from the MSDN website (just search for it in the usual way). You'll also need the Symbols download or use the MS server like WhoCrashed does. Install it all (it's big but beautiful) and run WinDbg. You'll need to set your source files folder to C:\WINDOWS\Minidump and your symbols folder to C:\WINDOWS\symbols (or wherever you put them). Then select "open crash dump" and the specific file you want - likely to be the most recent.
When set up, click away and it'll open a report. Read it, I'll wait here.
It'll probably suggest "Use !analyze -v to get detailed debugging information" somewhere down that report, so do that as well. Again, read the report and you'll usually get the gist of what the fault was. Usually. Take what action seems reasonable (ie fix, update, upgrade or throw it in the bin and buy a new machine).
If any of the above sounds ludicrously complex then just don't do it. Take it to a shop - or (if you are on the Central Coast of NSW) call me - instead.
Welcome to Windows. Hey, you'll get used to it. And don't imagine something similar doesn't occasionally happen in alternative operating systems like UNIX or the recent UNIX-derived Apple OS. Anyone who's worked on Apple hardware for example knows that whilst "closed shop" or proprietary designs can keep potentially clashing hardware and software designs under a tighter reign, when they do break it's often far less simple - and more expensive - to get to the root cause. And it's the very openness of the original "IBM compatible" and later Intel and Microsoft hardware/software partnership that both rewards us with plentiful alternatives at lower cost and delivers us into the looser, vaguer world of mismatched versions and uncontrolled design. But enough of that. How do you fix it?
Well the BSOD usually gives you a clue. I just got one - and it blamed "NV4_disp.dll". You don't have to be Einstein to realise that "NV" is probably NVIDIA and "disp" is probably "display". It's your smoking gun, usually.
The "dll" bit is a Dynamic Link Library file, simply a file that provides one or more particular functions and/or some data for a given application. Generally speaking - and I'll use NV4_disp.dll as my example here - it's a device driver of some sort. So in this example NV4_disp.dll is happily driving the screen (or monitor or display if you like) and we call it the video driver because having many names for simple things is cool. Then you start up a new or recently updated video player (like I just updated Real because it asked me to) and it innocently makes a call upon NV4_disp.dll that just doesn't make complete sense. Perhaps your version of NV4_disp.dll is (like mine) 6 months old or more and is subtly different from "today's" standard. Somewhere along the road an error crops up that doesn't get handled properly and Windows itself steps in to save us all from disaster - by shutting down. Extreme, I know, but probably safer than letting things go from bad to worse.
The best fix here is simply to update NV4_disp.dll. Whatever the BSOD identifies is usually the culprit, unless it simply can't work out what broke first. In which case you need to dig deeper (see the end of this story for more clues).
But how do you update a video driver? Or any other driver for that matter? Well the Internet can be your friend here - just search for say "NV4_disp.dll update" and choose the most likely - like the NVIDIA website. They have a tool there that searches automagically for the right driver. If that doesn't work (it didn't for me and my Windows XP SP3 machine) then go to your control panel and open the NVIDIA control panel. Look for "system information" and bingo, you have your driver data.
Plug that info in manually and it'll come up with the latest driver. Download and install that. Remember it's safer to download from the manufacturer directly, if you can. Run a virus check on the file just to be safe.
But what if you need more clues, Sherlock?
Well if the BSOD is clueless, try "WhoCrashed", a program by Resplendence.com that does the hard yards for you - and for free if you are a home user. (Search the Internet for it but remember to be careful who you download from and run a virus scan on the file.) WhoCrashed may ask where your source files are - and these are your "minidump" files. Minidump is simply a Windows repository for crash-logging files and is usually found under C:\WINDOWS\Minidump or similar.
I've rarely found Minidump turned off but some "tune up" software may turn it off to save space (not that it would save much). If turned off, turn it on (you'll find it via the "Help and Support Centre" in Windows, simply click on "Use tools.. ..to diagnose problems" then "System Restore" and "System Restore settings". Phew. Then open "Advanced" and "Startup and recovery" then "Settings". Still with me? Inside settings you should have a tick in "write an event to the system log" and "Small Memory dump" as the address written to... it will default now to %SystemRoot%\Minidump. Easy. Press OK to save and exit.)
And if you prefer to use the genuine Microsoft debugger it's called WinDbg and it comes with the genuine Windows set of debugging tools, downloadable from the MSDN website (just search for it in the usual way). You'll also need the Symbols download or use the MS server like WhoCrashed does. Install it all (it's big but beautiful) and run WinDbg. You'll need to set your source files folder to C:\WINDOWS\Minidump and your symbols folder to C:\WINDOWS\symbols (or wherever you put them). Then select "open crash dump" and the specific file you want - likely to be the most recent.
It'll probably suggest "Use !analyze -v to get detailed debugging information" somewhere down that report, so do that as well. Again, read the report and you'll usually get the gist of what the fault was. Usually. Take what action seems reasonable (ie fix, update, upgrade or throw it in the bin and buy a new machine).
Saturday, May 14, 2011
Windows 7 updates fail to install and are rolled back - again and again and again
Ever happen to you? Those automatic updates from Microsoft that usually just download and load up and self-configure at the next boot? Well with XP it has always run smoothly - if at times slowly - but with Windows 7 I have had more problems. Maybe because Win7 is on a laptop, or maybe not. So what's the beef?
Well some of these updates are big (like complete service packs) and can take hours to deploy on slow PCs on a slow network. So don't give up if it just appears to hang - wait it out. But if Win 7 tries to configure the updates but stalls, gets to 16% or even 0% and then hangs for 5 minutes or so, thinking about life or whatever before rolling back and uninstalling the updates then you may have a problem. Of course you could just have a timeout (it's a common error code) - and it will fix itself next time around. But if you wait too long you'll fill your restore point cache with failed updates and be unable to roll back to when it all worked... ouch.
Restoring from a known working state is the usual solution, if you have such restore points available. (Make more space for your restore points, just in case. And make a recovery disk, too, just in case.)
You may also have a corrupt system file, too. You can scan your harddrive for errors and check that out.
But here's what worked for me - I did a scan to ensure that there were no file system errors and then shut down (yet again - probably after 5 or so failed updates). When completely shut down I unplugged everything bar the monitor - no USB keyboard, mouse or scanner. And restarted. Bingo! It updated perfectly!
Here are some other ideas, just in case....
The update is not installed successfully, you receive a message, and the computer restarts when you try to install an update in Windows Vista and Windows 7
Windows update error: Code 80072F8F
Windows update error: Code 80072F8F
Windows update error: Code 80072F8F
Windows update error: Code 80072F8F
Well some of these updates are big (like complete service packs) and can take hours to deploy on slow PCs on a slow network. So don't give up if it just appears to hang - wait it out. But if Win 7 tries to configure the updates but stalls, gets to 16% or even 0% and then hangs for 5 minutes or so, thinking about life or whatever before rolling back and uninstalling the updates then you may have a problem. Of course you could just have a timeout (it's a common error code) - and it will fix itself next time around. But if you wait too long you'll fill your restore point cache with failed updates and be unable to roll back to when it all worked... ouch.
Restoring from a known working state is the usual solution, if you have such restore points available. (Make more space for your restore points, just in case. And make a recovery disk, too, just in case.)
You may also have a corrupt system file, too. You can scan your harddrive for errors and check that out.
But here's what worked for me - I did a scan to ensure that there were no file system errors and then shut down (yet again - probably after 5 or so failed updates). When completely shut down I unplugged everything bar the monitor - no USB keyboard, mouse or scanner. And restarted. Bingo! It updated perfectly!
Here are some other ideas, just in case....
The update is not installed successfully, you receive a message, and the computer restarts when you try to install an update in Windows Vista and Windows 7
configuring updates stage 3 of 3. 0% complete
Windows update error: Code 80072F8F
I was having this issue with Windows 7 and it turned out to be the root certs. I downloaded / installed the update from the link below and it fixed the issue:
Windows update error: Code 80072F8F
As a last hope I restarted last night my ADSL modem, that has not been restarted since going back to normal time. This morning I tried again to update the computer and Oh, happy day! the updates started!!!
Anyway I have no idea whether the restarting of the modem helped.
Windows update error: Code 80072F8F
I was having this issue with Windows 7 and it turned out to be the root certs. I downloaded / installed the update from the link below and it fixed the issue:
Windows update error: Code 80072F8F
I have been going crazy trying to fix this Update problem plus my gadgets were not updating. Finally about the third time I fooled around with the clock I noticed that the YEAR was wrong. Duhhhh. It was Jan 2010 instead of 2011. Sheesh!
Thursday, May 12, 2011
Just getting into 3D imagery? Have you tried these programs yet?
I'm by no means a master of 3D - yet - but I have tried a few programs and can recommend some great ways to get started. Like...
How about Bryce? PC version, of course, but Mac is supported too (just search for a link). Be careful to read the whole page or you'll miss the free rego code....
Bryce (Personal Learning Edition) - Free software downloads and software reviews - CNET Download.com
DAZ 3D - Free 3D Software and 3D Model Providers
blender.org - Home
And of course iClone 4 from Reallusion... easier to use but still powerful with a free version to boot... the real-time filmmaking is a standout.
iClone - Solution for Real-time 3D Animation 3D Stereo Video
That's all for now - it'll get you started anyway.
How about Bryce? PC version, of course, but Mac is supported too (just search for a link). Be careful to read the whole page or you'll miss the free rego code....
Bryce (Personal Learning Edition) - Free software downloads and software reviews - CNET Download.com
This Personal Learning Edition (PLE) of Bryce 7 is a full-version with no watermarks or limitations of any kind in the program itself. The licensing allows for strictly personal, non-commercial use. SERIAL CODE: BDZPLED-070-0000000-NBA-001-HBUVMLFAnd its companion, DAZ 3D Studio...
Bryce is an award winning, fun, feature-packed 3D modeling and
animation package designed to allow new users to quickly create and
render stunning 3D environments. Bryce combines exceptional power with
an innovative interface for incredible ease of use. Add wildlife,
people, props and more to your scenes via the DAZ Studio character
plug-in in addition to terrain, water, sky, rocks, clouds, fog,
vegetation, and architecture for which Bryce has long been the standard.
DAZ 3D - Free 3D Software and 3D Model Providers
DAZ Studio 3 Products and BundlesAnd Blender, an enormously useful tool for 3D work... you'll see Blender-ised 3D images built into applications all over the web...
DAZ Studio is a free, feature rich 3D figure design and 3D animation
tool that enables anyone to create stunning digital imagery. This is the
perfect tool to design unique digital art and animation using virtual
people, animals, props, vehicles, accessories, environments and more.
Simply select your subject and/or setting, arrange accessories, setup
lighting, and begin creating beautiful artwork.
blender.org - Home
Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License.
And of course iClone 4 from Reallusion... easier to use but still powerful with a free version to boot... the real-time filmmaking is a standout.
iClone - Solution for Real-time 3D Animation 3D Stereo Video
Real-time animation evolves with 3D Video FX, motion paths, HDR and rapid drag & drop creation inside iClone4. iClone4 combines real-time filmmaking & video production inside one powerful engine. The result is a streamlined production tool for motion graphics, 3D animation, video compositing and 3D stereo creation.
That's all for now - it'll get you started anyway.
Friday, April 29, 2011
If someone rings you up and claims that your "inf" dir is full of "infected" files.... hang up
There is a scammer on the loose hoping to get into your PC by claiming that your INF files are by default "infected". They are turning what are usually harmless and necessary information files into some sort of "proof" that your PC needs help. Don't believe 'em. Just hang up and run your virus scanner on that folder to prove it to yourself.
INF file - Wikipedia, the free encyclopedia
INF file - Wikipedia, the free encyclopedia
An INF file (stands for information) or Setup Information file, is a plain text file used by Microsoft Windows for installation of software and drivers. INF files are most commonly used for installing device drivers for hardware components. Windows includes IExpress.exe for the creation of INF-based installations. INF files are part of the Windows Setup API.
Sunday, January 23, 2011
Troubled by dodgy DNS from your ISP?
DNS stands as for Domain Name Server - a server (literally serving your requests) that converts the long and wordy web addresses you type into a browser into shorter, machine-decodable strings of numbers called IP (for Internet Protocol) addresses. It's just like looking up a telephone number by doing a name search. And it's done for you everytime you go to a web address (like http://gtveloce.com/ or whatever).
Now sometimes your local DNS 'phonebook' is down or just not up to date (it can be a day or more out of date). So when you search for a website it just doesn't appear onscreen, even when you 'know' it's there. Perhaps you even put it there. That's dodgy DNS for you. So you may wish to bypass your local DNS instead... but how do you do that?
Well you can simply replace your DNS server record in Windows (or any other operating system). It's safe and easy and completely reversible, just remember to write down your current settings (if any), just in case you need to revert.
There are usually just 2 alternative DNS address settings and your operating system tries one firstly and if it times out it tries the next. Sometimes your ISP (or Internet Service Provider) pushes the settings out to you automagically and other times they ask you (or some software) to do it instead. You may need to reboot after changing the settings, too, but only if it doesn't seem to work straight up.
Here are the instructions (for Windows XP, but Windows in general will be similar).
start->control panel->network connections->local area connection (NOT internet settings - well not usually, anyway - trust me)
->click on 'properties' and a box opens
->click on (to highlight) Internet Protocol (TCP/IP) -> and then click the 'properties' button underneath (another box opens)
->change from 'obtain DNS server address automatically' to 'use the following DNS server addresses'. The DNS server addresses may already be there, if so write them down just in case you want to roll back
->Pick some DNS server addresses from the list below (start with the closest geographic ones) and see what happens. Save all the way back, see if it works in your browser or ping or tracert in a command window (if you don't know how to do that just ignore it) to confirm - and reboot if necessary to make sure the settings have loaded. If it works, great. If not, try a different set of numbers.
Yes, it's tedious, but so is waiting for your ISP to refresh their DNS....
Here are some apparently free public DNS servers you can use (no guarantees, not necessarily tested by me and may have even disappeared - if so, try another)
Public Aussie DNS Server: 220.233.167.31 (I tested it and it's up and working - try it)
AU,QLD: 58.6.115.42 (very, very slow - perhaps avoid)
AU,QLD: 202.83.95.227 (fastest of these 3 - definitely try this one too)
OR try these - a bit far away from me but may be closer to you (although Google's servers are said to be fast):
Google:
8.8.8.8
8.8.4.4
Google's instructions (includes Win7): http://code.google.com/speed/public-dns/docs/using.html
or try
OpenDNS:
208.67.222.222
208.67.220.220
Hope that helps you.
Rob.
Now sometimes your local DNS 'phonebook' is down or just not up to date (it can be a day or more out of date). So when you search for a website it just doesn't appear onscreen, even when you 'know' it's there. Perhaps you even put it there. That's dodgy DNS for you. So you may wish to bypass your local DNS instead... but how do you do that?
Well you can simply replace your DNS server record in Windows (or any other operating system). It's safe and easy and completely reversible, just remember to write down your current settings (if any), just in case you need to revert.
There are usually just 2 alternative DNS address settings and your operating system tries one firstly and if it times out it tries the next. Sometimes your ISP (or Internet Service Provider) pushes the settings out to you automagically and other times they ask you (or some software) to do it instead. You may need to reboot after changing the settings, too, but only if it doesn't seem to work straight up.
Here are the instructions (for Windows XP, but Windows in general will be similar).
start->control panel->network connections->local area connection (NOT internet settings - well not usually, anyway - trust me)
->click on 'properties' and a box opens
->click on (to highlight) Internet Protocol (TCP/IP) -> and then click the 'properties' button underneath (another box opens)
->change from 'obtain DNS server address automatically' to 'use the following DNS server addresses'. The DNS server addresses may already be there, if so write them down just in case you want to roll back
->Pick some DNS server addresses from the list below (start with the closest geographic ones) and see what happens. Save all the way back, see if it works in your browser or ping or tracert in a command window (if you don't know how to do that just ignore it) to confirm - and reboot if necessary to make sure the settings have loaded. If it works, great. If not, try a different set of numbers.
Yes, it's tedious, but so is waiting for your ISP to refresh their DNS....
Here are some apparently free public DNS servers you can use (no guarantees, not necessarily tested by me and may have even disappeared - if so, try another)
Public Aussie DNS Server: 220.233.167.31 (I tested it and it's up and working - try it)
AU,QLD: 58.6.115.42 (very, very slow - perhaps avoid)
AU,QLD: 202.83.95.227 (fastest of these 3 - definitely try this one too)
OR try these - a bit far away from me but may be closer to you (although Google's servers are said to be fast):
Google:
8.8.8.8
8.8.4.4
Google's instructions (includes Win7): http://code.google.com/speed/public-dns/docs/using.html
or try
OpenDNS:
208.67.222.222
208.67.220.220
Hope that helps you.
Rob.
Monday, December 13, 2010
Rollbacks, backups and restorations
Just a few notes on being cautious and careful with your data... because if you lose it, it's gone! Of course you can lose anything - including your keys, your dreams and/or your self-respect - but I'm thinking digital. With the ongoing conversion of "things" into binary digits - or "bits" - it's easy to overlook the potential for loss of data.
So here are some tips:
Hard drives fail, often suddenly. So make backups. To do this, firstly file your digital documents and images in logical spots (so you can find them easily without a hunt) then do a back up onto a different device. A backup can be as simple as a copy - onto a flash drive, a web drive, a DVD or an external HDD - or can be via backup software. As long as it's done - and works (ie test it occasionally) - it may save you from some grievous digital loss.
You can also make complete images of your working PC setup using "ghosting" or imaging software. A 'belts and braces' approach to data backup and recovery may include regular backups onto external hardware plus a working "image" of your PC or other device (again, stored externally). Sounds too hard? Get someone to do it for you.
Programs and drivers sometimes screw up, too: or "what works today may not work tomorrow". It could be that some data was re-written but was unintentionally distorted in the process, or a new program or OS update overwrote a critical shared file and left your older software out of action. It happens. So prepare for that with new system restore point (a link below on how to do that in XP, it's similar in most popular operating systems). That way you can "roll back" to a previous, working state. Often software (such as device driver updates) offer "rollbacks" as standard, in case of drama. But if they don't - and the new driver has killed something you rely upon - you need a restore point.
And remember to do the occasional test restoration, so that you know it works!
Using System Restore in XP - How-To Geek
So here are some tips:
Hard drives fail, often suddenly. So make backups. To do this, firstly file your digital documents and images in logical spots (so you can find them easily without a hunt) then do a back up onto a different device. A backup can be as simple as a copy - onto a flash drive, a web drive, a DVD or an external HDD - or can be via backup software. As long as it's done - and works (ie test it occasionally) - it may save you from some grievous digital loss.
You can also make complete images of your working PC setup using "ghosting" or imaging software. A 'belts and braces' approach to data backup and recovery may include regular backups onto external hardware plus a working "image" of your PC or other device (again, stored externally). Sounds too hard? Get someone to do it for you.
Programs and drivers sometimes screw up, too: or "what works today may not work tomorrow". It could be that some data was re-written but was unintentionally distorted in the process, or a new program or OS update overwrote a critical shared file and left your older software out of action. It happens. So prepare for that with new system restore point (a link below on how to do that in XP, it's similar in most popular operating systems). That way you can "roll back" to a previous, working state. Often software (such as device driver updates) offer "rollbacks" as standard, in case of drama. But if they don't - and the new driver has killed something you rely upon - you need a restore point.
And remember to do the occasional test restoration, so that you know it works!
Using System Restore in XP - How-To Geek
Windows is well-known for having driver and .dll conflicts, as well as all sorts of software that causes problems with your computer. Luckily there’s a System restore feature that can return your computer back to a known working configuration, as long as you’ve created a restore point.
Note that some software installations will create restore points automatically, but you should run it manually before installing any questionable applications. (Or better yet, don’t install questionable applications!)
Tuesday, October 12, 2010
Webstuff: redirecting or refreshing a page of HTML
OK, you probably don't need to do this but I bet you've seen it done - you go to a website and suddenly - either immediately or a few seconds later - it redirects you to another site. It can be useful and legitimate or just plain deceitful and annoying. It all depends on the intention.
Well if your intentions are good then I'll tell you how it's done. (Or at least show you one way to do it - there's always more than one way.)
Here's some sample code:
(Like all HTML, wrap some brackets < > around it to make it work and pop it into the HEAD of your HTML page, ie after the HTML tag but before the BODY tag.)
meta http-equiv="REFRESH" content="0;url=http://www.the-domain-you-want-to-redirect-to.com"
(Don't forget to close off your "meta" tag, either.)
So what happens here?
Well the meta content="0;url=http://<b>the-domain-you-want-to-redirect-to</b>.com" http-equiv="REFRESH" is the part that actually does the redirecting or "refreshing". The number before the URL (in this case "0") tells your web browser the number of seconds to wait before redirecting to the new address (or URL). You could set this to 3 or 5 and add some explanatory text or just leave it at zero. Whatever suits your purposes.
So what do I do with this?
Just copy the code above into your HTML editor of choice - it could be Kompozer or even just Notepad - and save it as something that makes sense. It could be index.html if it's redirecting traffic off your domain or subdirectory root, which is the most likely use. Don't forget to change the domain name to the one you want to redirect to - and remember you can be explicit, right down to the page you want your visitor to land on.
For example I just put it to use in refreshing a page which contained an inline frame. I had a list of .PDF files inside the frame and if clicked they opened (that's the intention) - but you had to get out and back in again to get back to the list.
Instead of making visitors load a new page and then return I added a "Click here to refresh this list" button that simply took the browser out of that page to "refresh.html", a page that carries a "List refreshing now..." message and the above code. All it does is redirect back to the page with the inline frame - and voila! - the list has refreshed. Job done. And that's a legitimate use.
Well if your intentions are good then I'll tell you how it's done. (Or at least show you one way to do it - there's always more than one way.)
Here's some sample code:
(Like all HTML, wrap some brackets < > around it to make it work and pop it into the HEAD of your HTML page, ie after the HTML tag but before the BODY tag.)
meta http-equiv="REFRESH" content="0;url=http://www.the-domain-you-want-to-redirect-to.com"
(Don't forget to close off your "meta" tag, either.)
So what happens here?
Well the meta content="0;url=http://<b>the-domain-you-want-to-redirect-to</b>.com" http-equiv="REFRESH" is the part that actually does the redirecting or "refreshing". The number before the URL (in this case "0") tells your web browser the number of seconds to wait before redirecting to the new address (or URL). You could set this to 3 or 5 and add some explanatory text or just leave it at zero. Whatever suits your purposes.
So what do I do with this?
Just copy the code above into your HTML editor of choice - it could be Kompozer or even just Notepad - and save it as something that makes sense. It could be index.html if it's redirecting traffic off your domain or subdirectory root, which is the most likely use. Don't forget to change the domain name to the one you want to redirect to - and remember you can be explicit, right down to the page you want your visitor to land on.
For example I just put it to use in refreshing a page which contained an inline frame. I had a list of .PDF files inside the frame and if clicked they opened (that's the intention) - but you had to get out and back in again to get back to the list.
Instead of making visitors load a new page and then return I added a "Click here to refresh this list" button that simply took the browser out of that page to "refresh.html", a page that carries a "List refreshing now..." message and the above code. All it does is redirect back to the page with the inline frame - and voila! - the list has refreshed. Job done. And that's a legitimate use.
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