Hello. About 15 minutes after I log in, this Stop Error happens. I've got
debug info in shorthand.

0x50
(0x8280
0x00
0x8233A4e9
0x00)

Before the stop error pops up, my cursor blinks in between the normal arrow
and the "working" cursor. I've undone recent driver changes, nothing helps. I
can't system restore- I try, but it tells me that it failed.

I need to be able to keep my computer on for more than fifteen minutes at a
time. Can anyone help me?

I've got more information: here's the Event Information from the last memory
dump

Event Type: Information
Event Source: Save Dump
Event Category: None
Event ID: 1001
Date: 9/6/2005
Time: 10:36:30 AM
User: N/A
Computer: STEVEOS
Description:
The computer has rebooted from a bugcheck. The bugcheck was: 0x00000050
(0x82800000, 0x00000000, 0x8233a4e9, 0x00000000). A dump was saved in:
C:\WINDOWS\MEMORY.DMP.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.