Last version of driver and catalyst of my ati 4850 is 13.1, (with beta 13.4 seems problem)
I remove all windows microsof amd driver
-then i install driver Catalyst 13.1 (13-1-legacy_vista_win7_win8_64_dd_ccc)
but when i try to open catalyst from try bar , i optain this error:
With witndows 8, all runs good, but now? whats appened?
( i install new hd samsugn ssd 860 pro , can be this the problem? )