Need help: computer reboots whenever java is initiated.

Recently received a used computer with xp installed.
Every time I initiate something to do with java the computer restarts.
For Instance:
in control panel - clicking on the java console.
online - using online storage service "adrive.com" to upload files.
installing - running the java installer for jedit.
Each one of these things causes a reboot.
I've deleted and reinstalled the latest java runtime environment, ran virus/spyware scans, deleted everything from the computer I don't need, and cleaned the registry, but nothing has solved the problem.
Searched for a solution on google and troubleshooting guides, but the terms: java, reboot, xp, etc; are all so common that the results don't come anywhere close to the answer I need.

Wouldn't you know it. After spending all this time searching for an answer, almost immediately after I posted this I found the answer here on this forum:
http://forums.sun.com/thread.jspa?forumID=32&threadID=689707
Thanks to: Caffeine0001
For those who want to know: All I did was update my -Display Adapter- driver through -Device Manager- and ran windows update. Windows update probably had nothing to do with the fix, but it updated .NET to 3.5 and updated IE to version 8.
Good To Go!

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