If you did that it should have uninstalled the drivers as well, if not then uninstall them then go to the AMD site, download the correct driver or your operating system and card then run the installer.
Sign in as administrator (If you are not administrator you may be blocked)
Close all the applications that are being used...save and close your files...
Turn Off the antivirus and firewall, turn off the functions of windows defender.
If you have multiple security programs installed, they must be turned ALL off. Security will prevent your driver from installing...
Download the latest CCC driver package, and save it to an easy location. Make sure this is the correct driver for your card.
Delete all the current AMD video software and drivers, restart the system (the video will look screwy, don't worry)
Now load install all the newest CCC drivers and restart the system , turn security back on.