You might try deleting WMP. If WMP is not there, it can not automatically try to rip a CD. Create a restore point before you do it if you are using Windows XP. This should work. If it does, reinstall WMP. If if does not work, you can restore via the restore point you created and your computer will be as it was before you deleted. If you are not using Windows XP, reinstall WMP Version 10 which is available from Microsoft. I use a different program for my player, so I tell WMP not to be the default player for anything except WMA files including video. This way it does not try to autorun.
Hope this helps
gpayne