Anyone have this problem? Acer Aspire DVD r/w disappears does not show up in bios or in installed hardware. traded dvd roms with another acer both drives work in other computer neither works in mine. tries flashing bios does not cure problem. have used vista and xp pro and Kubuntu all OS’s have the same issue. i have tried the clearing of the upper and lower filters on this machine before, it seemed to solve the problem at the time, unfortunatly it reoccured whats next? the computer sits at a desk and is never mover so physical damage to the computer is not likly. does anyone have a fix for this? any ideas at least? BTW ACER is usless in troubleshooting they keep wanting to point at windows when i know it has nothing to do with windows.