I can't figure out why- there is nothing in my scheduled tasks that would do it. It is possible that your computer has been infected by a virus or malware – that is why it keeps on restarting.

Click the Settings button under Startup and Recovery (as opposed It goes to the Dell logo, sits there for about 20 seconds, shuts down, and restarts repeatedly. this happened randomly while I was working (really annoying to lose unsaved work !)I can't point out on a specific scenario this happens just randomly. Dell desktop keeps restarting I tried the The Startup Repair or “Recovery Your Computer” feature, available from Windows Vista onwards (including Windows 7 and Windows 8 or 8.