A couple of possible reasons for this:
A. As lagger said a virus
B. A drive remote control in the hands of a practical joker. (seen this done at work once)
C. Dirty optical lense making the drive think there is a disk in the drive. use compressed air can or a cd cleaner to clean the optics.
D. Possessed drive. Sacrifice a chicken to it. :smile:
<b>Tits a nice day today!
Breast i've ever seen!</b>
Officially Certified <font color=green>Hooter Inspector.</font color=green>