Whenever I run my Avast 4.8, it gets to a point in the scan ( I'm usually not home when when scanning) where my P.C. just turns on and off and re-starts on its own. Its like someone turns the on/off switch on me. Im thinking , it might be scanning and hits a virus, then the virus re-boots me... any ideas?

Check the settings you may turn on rebooting system after compltion of scaning

Vote if its useful

It doesn't even get to the point where it says scan finished... Its scanning then "Blip" off it goes... Done it 3 times at basically the same place...

Have you tried scanning in safemode?

I'd try scanning system32 folder, or other important folders, to see if you can get it to shut down, then at least you can pinpoint the file.

Thanks a lot, I will try the safe mode first, then the 32 file...