Computer Continuously Restarts

If your computer continuously restarts while running, or if you see the flash of a blue screen before it reboot, then Windows is in a state where the only way it can attempt to fix itself is through rebooting. While this will work with the occasional system crash, it will not fix the issue if there is a drastic hardware or software problem. Instead, your machine will seem to be caught in a loop of starting up, crashing and rebooting. The key to solving this type of problem is capturing the crash message that is flashing on the screen.
Prevent Windows From Rebooting

You can stop Windows from rebooting after a crash by doing the following:

1. Right-click My Computer
2. Select properties
3. Select the Advanced Tab
4. Under Start-up and Recovery, uncheck the Automatic Restart box and then click OK.
5. Reboot the computer

Now when your computer crashes, you should see the confusing Blue Screen of Death along with an error code. You can search Microsoft.com for the exact nature of that code and take measures to resolve it. Depending on the error, you might try rebooting into Safe Mode by tapping F8 while booting and running a System Restore to revert your computer back to a time when it was not crashing. Or you might run the error checking utility in Windows to scan your computer’s hard drive for issues. You might also run a popular program called Memtest86 to scan your computer’s RAM for errors that could be causing system stability issues.

The first step in this process is getting the blue screen to remain on the screen, and preventing the automatic restart is the way to do this