I had the same error when shutting down down Cubase (both 6.5 and 7). I renamed videoservice.dll (or something similar) to videoservice.dllx and the problem disappeared. The file is in the components folder than emotive mentioned. It’s a work around assuming that you don’t need video support.
Edit: You might be looking in the wrong folder. It’s in C:\Program Files\Steinberg\Cubase 7\Components.