I recently purchased DriverHeaven Driver Cleaner Professional Edition. I decided to remove my old version 6.2 driver for my X850XT and install the latest drivers. Accidentally I used the DH Driver Cleaner and first erased the drivers from my registry. Next I tried to uninstall the drivers from my pc. That turned out to be a big mistake. Now I can't remove my existing drivers, and the same error message appears when I try to uninstall my drivers. If somebody has a solution to this problem please help me out. Thanks.