I was having similar problems recently when I tried to update to the latest drivers for my system. I was lucky enough to have a restore point in windows to a last working state. Others have had luck with doing a complete and clean uninstall of the AMD drivers. You can find the proper steps on how to do this on the AMD site, follow the steps exactly. I can't help you more than that since I was unable to install the latest drivers and am still waiting for a solution in my case. Good luck.
Don't know if you are still having problems. I ended up submitting a ticket to AMD and they were very helpful. For my situation, the only option was to do a Windows reset, let Windows complete all updates (even video drivers), follow the direction about how to completely uninstall AMD drivers and then follow directions on how to install the latest ones compatible for your system. If your MoBo also has AMD chipset, install those first before installing the video drivers. Since your situation may not be the same as mine, you might be better off submitting a ticket.