My T500 is crashing

[nsoliman]

Hi everyone
I have a T500, running Windows 7. It's restarting while I am in a middle of working, with no pattern. The only thing I noticed is that when there are some heavy activity, such as downloading and working at the same time, it crashes.

Any idea where to start from?

[Colonel O'Neill]

Could be overheating, could be drivers, could be a virus, could be whatever heavy-duty program having a fault in it's original programming.

What exactly happens? Does it error before causing a restart? Does it go through the standard Windows is shutting down procedure or is it a sudden power off? Does it present a BSOD?