Media Player Library Details

When starting media player for the first time if you have an existing library collection I would advise to uncheck the option where media player tries to update the music files information. Generally I have found it just makes a mess of things.

This can be found in WMP12 in Organise --> Options and then on the 'Library' tab. Uncheck 'Retrieve information from the internet'

If you forget to do this then you can delete the current library and start again.

Just delete all the files in the root of the following folder on Windows 7

C:\Users\YOUR USERNAME\AppData\Local\Microsoft\Media Player

media player will then rebuild them.