Run Hardware Diagnostics to confirm no Hardware errors. If errors found, replace necessary parts.
Run MS Fixit: http://go.microsoft.com/?linkid=974...
If this issue started occurring after doing some recent software changes on your computer, then I would suggest you to restore your system back to a date when it was working fine. System Restore will affect Windows system files, programs, and registry settings only. For System Restore steps, you can refer to the URL mentioned:
Thanks & Regards