How come my computer keeps restarting?

I DON'T have a virus I have scanned with Avast 4.7 Professional, AVG Anti-Spyware, and AVG Anti-Virus.

How come my computer keeps restarting?free spyware remover

Random restarts/reboots/resets/crashes/freezes could be due to several reasons, including overheating, RAM, hardware issues, etc. Just do the following and post back with the info so that we can narrow it down some.

Try rebooting(restarting) in safe mode = http://www.computerhope.com/issues/chsaf... , then go to control panel/ system / advanced Tab/ startup and recovery box/ settings button/ sytem failure and uncheck "restart on system failure" ( take the check out of automatically restart box ) , and check the Write a system event, and the Admin alert boxes (check "send admin alert"). This will force a BSOD on the next crash (freezes/restarts = crashing) that posts the Stop Error Code. On the next crash write down the exact Stop Error Code and post that exact error in Yahoo and/orGoogle search, and in the MS Support Knowledge Base (KB) = to check it out.-

http://support.microsoft.com/search/?adv... + http://support.microsoft.com/kb/316416

Also go to your device manager (devmgmt.msc) and check the properties and look for anything suspicious and check that the settings are where they should be. Events and Errors Message Center = http://www.microsoft.com/technet/support...