Are you noticed that if you delete a music file from hard disk,that music file information still can find in Windows Media Player 12 (WMP 12) music library,the problem is you also can’t delete it in music library and all the music or song file appear in music library ,then can’t find out which music or song already take out it from hard disk.
First you need to delete music library cache file inside Windows Media Player 12.Locate C:\Users\computer name\AppData\Local\Microsoft\Media Player\
, find CurrentDatabase_372.wmdb
this file and delete it.
Then open up Windows Media Player 12 and it will scan through all the music file again,all the delete music file will not show in music library again.
Hope can help you all.