Problem with my optical drives

[Contagious]

So basically, when I finish playing a game and eject the CD and then later insert a different CD, it can't read the new CD. This happens on both my DVD and CDRW drives. When I go into My Computer the drive shows that I still have the old CD in the drive, but when I try to access it I get the message:

"volume has been externally altered so that the open file is no longer valid"

I then have to restart the PC before I can read any disc from then on out, on either drive.

Anything I can try before I just reformat?

Thanks

 

[Ricemarine]

Do a disc doctor on that cd.

 

[Contagious]

It happens on every CD. If I take a CD out and put a different one it, the new one won't work unless I reboot. It's really odd.

 

[Ricemarine]

Mmm.. see if you can update the firmware.. check your ide pins,

 

[Contagious]

It happens on two drives that are two years apart and are from different manufacturers. One of the drives actually arrived in the mail today. I thought that it was the other drive's fault.