Please run sfc /scannow.
The sfc /scannow command scans all protected system files and replaces corrupted and incorrect versions with correct Microsoft versions.
Important: There will be a short message at the end of the scan informing you of the results. If you receive the message "no integrity violations were found" you don't need to do anything else, no corrupt files were found. You should watch the scan to see the results at the end of the scan.
1. Click on the Start orb, then type cmd in the Search box.
2. CMD will appear above the search box, right click on it and select Run as administrator.
3.When the Elevated Command Prompt opens copy and paste the command below, then press Enter.
This will start the scan. Please allow the scan to complete. Stopping it could damage files.
4.To find the sfc /scannow log open the start menu and click on Computer.
5. Click on the drive letter Windows 7 is installed on. This usually is the C: drive.
6. Clik on Windows, then Logs, then CBS.
This log usually is very large, for this reason you should use a host website like Dropbox
to post the log. You can start a free 30 day trial. Once you have loaded the log at Dropbox post a link to the website.