when I power on my laptop, sometimes my dvd drive will show as installed for a little while, until I open a program and try to use it, then it disappears into thin air. I just want to watch a movie on it, since that is what I have it for mainly. I have tried various programs to use it with, but it always stops working once I try to use it.

my system is xp professional and its a Toshiba Satellite with a Centrino Duo.