I am spent all day trying to get Parallels working with Bootcamp. I have a MacBook Pro Duo Core 2.2 GHz running the latest updated Leopard OS. I have Bootcamp running the Windows XP Pro, sp 3. I have upgraded my Parallels to the latest 5600 build and am still having the same problem: After I install Parallels and get it running with Bootcamp, as soon as I run Bootcamp natively, the next time I boot into Mac OS and run Parallels I get the error message: Parallels Desktop cannot find necessary drivers to configure your Boot Camp partition. Please refer to Help> Parallels Desktop Help> Using Boot Camp Windows XP Installation for troubleshooting. I can uninstall and reinstall Parallels and get it working again, but the same thing will happen, so I end up having the reinstall Parallels everytime I boot back into Mac OS!! I'm really disappointed and hope that it's supposed to work better than this!! Any help would be appreciated!!