Sounds like your having some issues with your OS, You could run a Repair Install not losing your programs or files. Or you could try Repairing your OS
Open a Command Prompt, type CMD then right click cmd.exe and run as admin.
I would uninstall Flash player run these tools then reinstall the latest version of Flash Player
Run each of these DISM tools one at a time, don't get impatient some of these will take a while as they are repair issues.
You can copy and paste these commands
Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-Image /RestoreHealth
Dism /Online /Cleanup-Image /StartComponentCleanup
SFC /scannow Run SFC/scannow three times
chkdsk C: /f