Please uninstall all AMD Drivers using this guide.
After all AMD drivers are uninstalled from your system, please scan and repair your Windows install for any errors or corrupt files, which could be causing issues.
To do this on Windows 7, simply follow the guide on this link.
Run Windows Update and ensure you’re checking for and installing all available updates, including non-critical and recommended updates. You may have to restart your computer several times and check for new updates upon reboot of your computer before it’s fully up to date.
As soon as you’ve completed the scan for any corrupt files and you’ve fully updated your Operating system and restarted your pc, the next phase is to download DDU, extract it and run it. Follow the prompt to restart in safe mode and then click Clean and Restart. You can download DDU here.
I believe the above steps should resolve the issue.