If you google the error message, you'll see pages and pages of results. I have skimmed some of them, and the cause can be anything from a bad driver to overheating to cards that were not seated right.
This little piece of freeware is very useful to identify exactly what is installed on your machine, and will help you get the correct drivers:
Download Unknown Device Identifier 6.01 Free - Identify unknown devices, search for drivers
It comes in handy on those occasions when Windows' System Information only gives you a generic answer.
I've also found a fairly detailed troubleshooting procedure on one of the forums and copied it below.
Let us know how it turns out.
To get further information about the error look in your Event viewer.
Look in the System or Application folder. You can get to the Event Viewer via right click My Computer icon and select Manage.
Any errors logged in the Event Viewer can be expanded by double clicking on the error line.
Take any event error I.D. number and search for it on these sites.
Event ID Matrix
Also check any "Information" line that mentions "savedump" and you should find reference to "recovered from a bug check". This is the Stop Error that caused your problem.
You can also turn off "automatically restart after an error" so it will just halt at the fault and display the full Stop Error and blue screen.
Right-click My Computer, and then click Properties .
On the Advanced tab, click Settings under Startup and Recovery .
Click to clear the Automatically restart check box under System failure , and then click OK . The error message on a blue screen should remain on the screen so you can record the error information.
Is your Bios updated?
These errors may be caused by defective physical memory or incompatible software which caused a hardware driver or service request for data that was not in memory.
If the error occurred after installing a device driver or application, try using Safe Mode and removing the driver or program.
To check your RAM.
Memtest86.com - Memory Diagnostic
Microsoft Online Crash Analysis
To check your drivers.
HOW TO: Verify Unsigned Device Drivers in Windows XP
To check conflicting software.
310353 - How to Perform a Clean Boot in Windows XP
316434 - HOW TO: Perform Advanced Clean-Boot Troubleshooting in Windows XP
Some general things to try.
See if System Restore will get you back to a restore point before your problem with Explorer.
Try Safe Mode (Do you have this problem in Safe Mode?). LAST KNOWN etc
Try running ChkDsk to check your drive for errors. Right click your Drive icon/ Properties/ Tools/ Error Checking.
Run the System File Checker program from the Run Box by typing.....Sfc /Scannow in it and have your XP CD handy.
If they don't work you could try repairing windows itself by running it over itself. You will lose all your windows updates but your files will be untouched.
How to Perform an In-Place Upgrade (Reinstallation) of Windows XP (Q315341)