kdbsync The problem will be also detected by Gpu-Z (opencl64 bug). Workaround (not suggested) We can remove the registry key so that it will not try to start at all 32 bit HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AMD AVT 64 bit HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AMD AVT -possible value in the registry- Cmd.exe /c start "AMD Accelerated Video Transcoding device initialization" /min "C:\Program Files (x86)\AMD AVT\bin\kdbsync.exe" aml This solution will not give you a set of features (as for the name "Accelerated Video Transcoding") but you will not notice the difference from before. Solution Reinstall the AVT and OpenCL. Remember to close GPU-Z and any other application that can use OpenCL. Sample path for the already installed drivers. It could also be within X:\ATI\... (AVT) C:\AMD\Support\12-10_vista_win7_win8_64_dd_ccc_whql_net4\Packages\Apps\AVT64\AVT64.msi