Which operating system are you using? When did this start? Have you made any changes to your system recently? Have you tried updating teh drivers for the CD Drive?
Flame
Windows XP Personal. I'm not sure when it started; it's been a bit but I've also been busy lately. About the only changes, besides installing a few games, is I a few weeks ago had to repair my system piece by piece after a nasty spyware bout; I think it might be linked to that. I'll try the drivers, and give an update.