fix windows7 corrupted

Type : CMD- Run as administrator

C:\Windows\system32>sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.

Windows Resource Protection found corrupt files and successfully repaired
them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For
example C:\Windows\Logs\CBS\CBS.log

C:\Windows\system32>

No display when you on PC

1. Maybe display card problem
2. Maybe Ram problem.

Test and try.