W2000 box keeps crashing



I'm having a heckuva time with an old Windows 2000 box... can someone
here help out?

A few weeks ago, Windows began to hang (crash?) 2-3 minutes after
login. By hang, I mean that the screen froze, the keyboard became non-
responsive (couldn't toggle Num Lock), and client computers lost
connection to shared folders.

I decided that the problem was overheating. So I installed a case fan
and cleaned and reseated the CPU heat sinks with new thermal goo.
Temps stay fairly cool, but this did not fix the problem.

The RAM checks out fine (memtest32), SMART status of the drive is
fine. It works perfectly in Safe Mode. I ran CHKDSK /r twice -- the
first time it fixed a few problems (probably due to crashes), the
second time it was fine. It found no bad sectors. Still, it continued
to crash.

I eventually figured out that it crashed less often if I unloaded the
antivirus software. It seems like the fewer things I have running, the
less it crashes. So, I uninstalled almost everything except the
necessary programs.

So now it's pretty stable. It passed a stress test (HeavyLoad by Jam
software). However, if I try to install software or run defrag, it
crashes.

I just can't figure this out. Like I said, memory, CPU temp, hard
disk... everything checks out. It almost seems like some kind of IO
problem. Maybe that's why defrag, software install, and antivirus
cause it to crash. They're all very I/O intensive.

Any thoughts?

Thanks.
Joseph

.



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