Ever had the system reboot with a blue screen flashing in front of you for a fraction of a second? Annoying and/or cryptic error messages popping up with every click? The following links may help to solve your problem. Check them out before posting a thread as they may answer your questions.
Some thing I didnt see mentioned in the above links.
If you find that your system is having Stop Errors (Blue Screens)
It is important to get the error message that Windows will provide.
Unfortunatly Windows isnt set to give this info. but with a small adjustment it will.
Open the control panel and double click system.
Then open the Advanced System Settings on the left.
Then open the Advanced tab then Startup and Recovery settings.
Uncheck the Automatic Restart box and hit OK.
If your system encounters a BSOD again it will wait with a error code that you can use to help find the trouble.