I have changed tha DVD unit and the same problem exists. On the origional unit when you try to click on the drive the media is ejected. On the replacement the DVD unit askes if you want to reformat. The origional unit is H-L GSA-T20F the replacement unit is Panasonic UJ-850. The OS is Vista Home Premium. I have not checked for updates or revisions. Guess I will while I wait.