you should be able to run the protools installer from your CD/DVD. it will give you three options on uninstall: program only program and drivers program, drivers, settings, etc. you should choose the last one if you want to make sure everything is removed. if you choose to re-install, sometimes it helps to leave the mbox unplugged during the installation until prompted to connect the device... then completely ignore all the OS dialogs that come up and let the installer do its thing. messing with the OS dialogs while the installer is running can lead to some odd installation problems. jeff