OpenMG, I thought, was something to do with the Sony ATRAC3 audio format. I didn't think that Studio did anything with that audio format, so I'm *thinking* that this may be a result of something on your system that's insisting upon trying to invoke this OpenMG thingy when other programs act like they might want to reference some audio media. Maybe.
You ever have anything by Sony (e.g. SonicStage, or a jukebox program, or whatever) installed on that machine?
BittMann
Update: Here's an old link with more info.