Whenever I try to download a file from the internet at this computer the computer restarts after the download has begun. What may be the problem?
scan it for virus/spyware.
You Problem is Simple - Virus
Do full scan of Your PC in Safe Mode from a Good Antivirus like Kaspersky Internet Security
& tell the results
are u ussing any third party download client?
No, I am using internet explorer only without any other client
Try downloading with different browser - Firefox or Opera...
Also, run virus and spyware scans in safe mode
Finally, if problem persists, post your HijackThis log report...
Arun