I am using XP service pack 3 and have installed WMP 11. I try to start the program and get the message " Windows Media Player is not installed properly and must be reinstalled. Do you wan:'( t to install the player from the Microsoft Web site?" Accepting 'yes' to this and reinstalling brings back the same message. I tried uninstalling but can only roll back to a previous version. A word from the wise would be very much appreciated.