dodger46 :
Not an easy one to diagnose, remedies have varied from a clean install of Windows to a simple run of SFC
As SFC is so quick and easy, start there...
Start/Run/CMD Rt click Command prompt and run as Admin
type sfc /scannow and hit Enter
C:\Users\ROCKY>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
The system file repair changes will take effect after the next reboot.