Q: my iTunes library is full of music I did not buy at iTunes store

Hi sandy146,

Welcome to the Support Communities!

What version of iTunes do you have on your PC?

The information below will show you how to show the Sidebar so that you can see your Purchased music.

If for some reason you still don't see the songs, you can redownload them.

iTunes: How to install the latest version

http://support.apple.com/kb/ht5654

iTunes: Turning on iTunes menus in Windows 8 and 7

http://support.apple.com/kb/HT5610

iTunes 11: Frequently used features

http://support.apple.com/kb/HT5649

iTunes: Finding lost media and downloads

http://support.apple.com/kb/TS1408

If the missing media is an app, a song, an album, a music video, or a book, you may be able to download it again free of charge.

Hope this information helps ....

- Judy