The simplest and quickest way is to setup a new iTunes library. This will ONLY work if you have Apple iTunes Music Match purchased. Otherwise do NOT attempt this process.
- Close iTunes.
- Move your existing iTunes library to another location on your drive (DON'T DELETE!).
- Re-Open iTunes, and you should now get a message like.
The folder “iTunes” cannot be found or created, and is required. The
default location for this folder is inside the “Music” folder.
- Hit OK.
- You should now get a new window asking you to Create Library..., Find Library... or to Quit. You want to Create Library.
- You will get the New iTunes Library window. Choose where you want it to go and hit Save.
- This should create your new iTunes Library.
- Sign back into iTunes, and as long as you have Music Match you should have access to all your music again. BUT.....
The MAJOR DRAWBACK to this method is that you will have removed any videos, books, apps or anything else stored as part of you iTunes library. These should also all resynchronize with your iTunes library, if you want to download them. Otherwise they will be stored on the Apple cloud tell you do re-download them.
This does NOT include any videos, audio books, or other files that you might have "ripped" that were not acquired from Apple. You will lose these files if you don't move them from your older iTunes Library to the new one.
If you are happy with the way this turns out, then you can just start using the new library and get ride of the old one. MAKE SURE you have all the files you want in the new library BEFORE deleting the old one.
Otherwise you can trash the NEW iTunes library, and move you old one back.
ALTERNATIVELY: You can go into the iTunes library folder, open the iTunes Music folder, and then delete all the music folders, while leaving the Movies, TV Shows, Podcasts, and iTunes U folders. AGAIN, you must have Apple iTunes Music Match purchased for this to work.