When you state "restart it", do you mean that you turned off the power ?
Powering off a workstation could have corrupted the file system. To diagnose, go to "run" and enter "cmd" at the command prompt enter
chkdsk c:
P.S.
I am going thru a corrupted file system and am getting a new PC on Monday, provided by the business.
SQL = Scarcely Qualifies as a Language