|... have you tried it in safe mode?|
... tap "F8" key @ boot-up select "safe mode" using arrow keys [press ENTER]
... once in safe mode click "no" on the "pop-up" that should guide you to system restore
... select a restore point by altering the restore calendar to a time when the pc was working fine.
... if it does work I suggest that you turn off system restore reboot then turn it back on again!
... to turn restore off... right click "My Computer" click properties click system restore (tab) "check" turn off system restore...
"...pentathol makes you sing like a canary"
... got brain freeze