1. Open an elevated command prompt, i.e command prompt run as an administrator. To do this, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
2. Now type the command sfc /scannow and press enter. The System File Checker will start checking the system.
This will resolve any corrupt files within the OS and *may* help resolve your issue. I would do this before tweaking with the registry. Also, please remember to perform a Backup of your files and create a System Restore point before tweaking your Registry!