Whilst in Safe mode, did you not try System Restore?
Or try this again in Safe mode.
Open a Command Window in Administrator mode:
- click All Programs, then Accessories
- right click on the Command Prompt option,
- on the drop down menu which appears, click on the Run as Administrator option.
If you haven’t disabled User Account Control (and you shouldn’t!) you will be asked for authorisation. Click the Continue button if you are the administrator or insert the administrator password.
Start the System File Checker
In the Command Prompt window, type:sfc /scannow,
- press Enter.
- You’ll see “the system scan will begin”.
The scan may take some time and windows will repair/replace any corrupt or missing files. You will be asked to insert your Windows 7 DVD if it’s needed.
Close the Command Prompt Window when the job is finished.