Does it turn off or restart? You may be describing a system shutdown due
to overheating or memory failure, or an automatic restart due to a crash.
First, turn off automatic restarts - right click on My Computer, choose
Properties, then the Advanced tab. Choose Settings in the Startup And
Recovery section, and de-select "automatically restart" in the System
Failure section. CHoose Apply and OK back to the desktop. Now, if the
problem is due to a crash, you should see some kind of error message which
should provide clues.
Next, run Memtest.
http://hcidesign.com/memtest/
If errors are reported, consider that the memory is damaged (or just not
good enough) and fails under heavy load, and the system responds by shutting
down.
And, open the case and check that the fans are all working and that the
vents, blades, and fins are not blocked with dust or otherwise obstructed.
To clean it, take it outside and use a can of compressed air to blow dust
out. Do *not* use a vaccuum as this will generate static and likely destroy
chips.
If your system has temperature monitoring software, make some use of it to
see if it is overheating.
HTH
-pk
it doesnt restart it just turns off... i deselected automattically restart but that didnt help it did hte same thing and i couldnt get that software to work from
http://hcidesign.com/memtest/