I don't know what I did to my computer!
Seti@home and Boinc-Seti both crash, reboot, my computer with no
warning at all. I don't run them at the same time or anything. I just
thought I'd try Boinc some of the time. Now, it doesn't take 2 minutes
for either to reboot my machine with no warning. This happens
everytime I run either of them.

Everything else "seems" to work fine. I've even done some video
conversions which are very CPU and disk intense with no problems. 
The only changes I've made are moving from Netscape to Mozilla and
adding Boinc. 

Things I Tried:
1. I uninstalled both Seti's and just installed Boinc-Seti but I get
the same thing.
2. Ran Chkdsk and Defrag. No help.
3. Used 2 different virus scanners (AVG and the online Mcafee).
Neither stay in memory. Neither found anything.
4. Cleaned the system with Windows-Washer. No help.
5. Ran Sisoft's Sandra diagnostics and found nothing wrong. CPU,
memory, disk, everything checked out OK.
6. Ran MBM to watch CPU temperature during unwanted reboot. The CPU
never got over 116-F, which is good.

Specs:
OS: Windows XP Pro (all upgrades). Recent fresh install.
CPU: AMD Athlon 2400+ (not overclocked)
PSU: 450W (More than enough for my setup) 
Seti and Boinc Versions: All latest downloads

Note: The last time it rebooted unexpectedly I had Mozilla going. When
it rebooted it found lost file chains during scandisk. It had wiped my
bookmarks and preferences in Mozilla. I had backups, but yow! I'm
guessing Mozilla was playing with the disk when it crashed. I won't do
that again!

Well, I guess I'll have wait a while to run Seti again. I have to  see
if I have a hard-drive crashing, a virus, or some bizaar setting wrong
somewhere.  Beats me! I'm not sure what else to check. Anyone else
have this strange problem? 

P.S. I guess I could reinstall XP, there is a way to do it without
losing all my settings, but I forgot how....And, I might try one of
the other number crunching projects, just for a few units,  to see if
they crash me also. Any other ideas?