Delete the file named autorun.inf from the drive's root folder, and then
reboot. You may need to enable viewing hidden files.
Make sure you are able to see all hidden files and extensions (View tab in
Folder Options). In XP, there are four checkboxes to deal with:
a. Check "Display the contents of system folders".
b. Check "Show hidden files and folders".
c. Uncheck "Hide extensions for known file types".
d. Uncheck "Hide protected operating system files" and click "OK" to the
dialog box.