Same here... ATI really are letting themselves down with the constant driver problems of one sort or another..Installed last night but done no testing.
Took an hour today for the random 99% load/UAC hang issue to appear. Nice one ATI/AMD.
It's been there since 10.11 for me, so it looks like it ain't gonna be fixed anytime soon, if ever. Do the 6000 series have this issue with the last few drivers ? If so, I find it astonishing that this problem is going unchecked.

