I have had the same issue with Windows Live Messenger it seem's to happen when i have had a cd or dvd in the drive and removed it while using the messenger application. Otherwise when there has been no cd or dvd in the drive while using the messenger application there have been no error's. However this error is wierd messenger shouldnt have anything to do with cd or dvd drives, could it be possible that it may be due to show what i am listening to in media player wether or not you are listening to a music cd ?