All your media files that you collects on your computer whether you buy music, convert your music CD:s to media files can windows media player library search and find. You don´t even have to place your music at the same location on your computer. The library will create a database to know where it is located, what it is and and so on.What if you want to erase windows media player database?

1. Select all your albums or media songs in the library. Make sure you delete the information in the database, NOT the actual media files on your computer. See picture below.

1. OR find and delete a file named wmplibrary.db in c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index