Every time I run an anti virus checker, half way through the computer reboots?

Any ideas anyone?

I have tried using AVG 7.5 and a online checker called Trend Micro HouseCall and they both reboot the computer after about 10 mins of scanning. When the computer boots after the reboot a black screen in DOS comes up saying that I have a hardware or software problem, what would I like windows to do? When i select continue with windows as normal it get to the windows loading screen then it reboots again. If i leave the computer turned off for 5 mins or so the computer seems to boot up again ok. But if i try to run a virus checker again the computer will reboot.

Every time I run an anti virus checker, half way through the computer reboots?best antivirus software

Do a physical check first...make sure your cpu is seated tightly as not to overheat and check the condition of the cpu cooler for dust...clean out if necessary....

I can not tell you how many people thought it was a virus when all it turned out to be was high temps on their cpu shutting the system down and rebooting for no reason...also some turned out to be a faulty power supply...

Might want to check into that just in case

It could also be a virus or driver issue. Windows 2000 (%26xp) have a feature that automatically reboots the computer on certain errors. You can disable this feature as a troubleshooting tool -you will see the error appear. to do this, right click "my computer" and select "properties". click the "Advanced" tab and then the "startup and recovery" button. In here you will see a tick box next to "automatically reboot". Take this tick out and you will likely see the error if caused by the above suggestions.