I just want to know if you've had this problem:
I have a CD inside the CD-ROM drive. Windows explorer is not running, and I change the CD.
I go to My Computer, and the label of the previous CD hasn't changed. I doubleclick the icon and I get the same files as in the previous CD. I try to run something in the CD, but I get a "File not found" (duh).
So, I have to, My computer running, open the CD drive, and close it again. Only then it works!