This is a known issue in Windows, and is related to starting the application while a CD (any CD) is in the drive, then ejecting that CD while AccuTrack is still open. This can cause a "false mapping" to the CD. Now the next time you open AccuTrack (and from then on), you will likely see the warning.
The good news is that there is a workaround for this issue. Please see the attached document for detailed instructions.
Thanks,
David Foster
AccuTrack Support