That's true. Buffer underruns can be for multiple reasons. It may even be the need for softw upgrade or device ware upgrade. Or even the media used. May even be to do with the OS system having some issues for some reason. Yes an unstable OS or overused/corrupt ram can affect burning a cd. It may even be to do with loose connections between the computer & burner. Or the data can't be read fast enough to burn for some indirect reason.