Nizhny, What version of Catalyst Control Centre do you have? I had 14.12 with Omega and it seemed that it was the problem. I downgraded my CCC to 14.4 and have not faced CTD yet. Try to downgrade your drivers and see if there is any change.
A Windows update causes trouble. Its': kb3004394
Comfirmed in the AMD forum regarding the 14.12 driver (if you want a link, tell please) and MS itself:http://support.microsoft.com/kb/3024777/en-us