Hi, I have an urgent problem. Whenever I try to scan the computer with Windows Defender for spyware after a while as the scan is on, the computer shuts down. otherwise the machine functions ok. When I scaned the machine with norton it deleted one at-risk file. but the problem persists. please help. Ketan Kothari Phone: Res. (Including city code) 022-24223281 Mobile: 09324341866 MSN ID: muktaketan@xxxxxxxxxxx Skype ID: ketan3333