Hello there, My desktop computer is installed with Windows 7 64 bit and the graphic card on the computer is ATI HD 4870. Recently I installed the new 10.1 Hotfix drivers on the computer but still the graphic card is giving same problem. The display card stops responding frequently while using. Is there anybody else who's ATI Catalyst 10.1 Hotfix driver's are not responding? If yes then please suggest some solutions. Any help is highly appreciated. Thanks in advance.