I was at my neighbour's place trying to back up a movie for him; however, every time you hit the 'Burn' button either with Nero or Copy To DVD. The disc tray ejects and asks to put in a blank DVD. Tried with RITEK and another brand as well. Does the same for CD's as well. Tried 'System Restore' as it was working the previous day also reinstalled Nero but no good. Also I noticed that if after attempting to burn, you put a cd in either tray(burner or CD ROM), you get the mesage that there is no CD in the drive. Restart the system and hey presto it will read. Any suggestions?