Have you installed the latest AMD Catalyst?
EDIT: http://support.amd.com/en-us/download/mobile?os=Windows%208.1%20-%2064#amd-catalyst-packages
Install that and see if the problem still occurs.
EDIT: http://support.amd.com/en-us/download/mobile?os=Windows%208.1%20-%2064#amd-catalyst-packages
Install that and see if the problem still occurs.
