yes, vista 64bit. The avformat51.dll that is required does not exist, but there is avformat52.dll that is installed, although after renaming that to 51 instead of 52 i can get the fd3 crack to run for a min, until it encounters an error and has to close. Essentially the decompiler itself requires the avformat52.dill as opposed to the 51.dll the crack requires. So it appears to me that the crack is not compatable with the version of the decompiller being used.