Some times for strange reasons, you may be unable to print out of iTunes. All the sudden you are unable to print your playlists or other iTunes information. This requires a complete removal of iTunes, QuickTime, and other apple components.
The following link gives a great tutorial on the complete removal process for Windows XP. Once all neccessary software is removed then proceed with the reinstallation of all appropriate apple software so that you may print from within iTunes once again.