Flight simulator x
I recently re-installed windows xp as i was having problems. My PC worked at snail pace. I didn't save flight sim x as I have the installation DVD to re-install it. However, when I put the DVD in to load the disk is not recognised
Is any other CD/DVD recognized? I'm assuming since you reinstalled XP that it was working then.
Also, have you tried cleaning the lens on the CD/DVD? Is the Flight Sim DVD dirty and/or scratched up?
Did you open up the computer at any time? Maybe the cable is disconnected or loose and just needs to be reseated.