win2k KMODE_EXCEPTION_NOT_HANDLED

[Fyron]

About an hour ago, I got a BSOD in Windows 2000 sp 4 with the following information:

Stop 0x0000001E (0xC0000005, 0xA012609C, 0x00000000, 0x00000063)
KMODE_EXCEPTION_NOT_HANDLED
*** Address A012609C base at A0000000, DateStamp 4047dcd6 in win32k.sys

Googling "KMODE_EXCEPTION_NOT_HANDLED" turns up a lot about viruses that I do not seem to have, due to not having any registry keys matching what I am supposed to be removing:

http://support.microsoft.com/kb/q294728/

And this telling me to install the latest service pack, which I have:

http://support.microsoft.com/default...b;en-us;811363

The computer performs a hard reboot randomly, sometimes after just a few minutes. I can not run a more complete virus scan due to this. Temperature and voltage readings seem to be within tolerable ranges.

I haven't changed any hardware or installed any new software recently.