Identify multiple missing items in my iTunes library on my PC so I can delete them all at once?

See Duplicate songs in iTunes - Apple Community for some advice on duplicates. The DeDuper script can eliminate duplicate tracks where one copy can be found and the other is missing, while gathering up ratings, play counts, playlist membership, etc.

Lost & Found playlists

Create a playlist called Found, select everything in Music and drag it into the Found playlist. Create a smart playlist called Lost matching All the rules Playlist is Music and Playlist is not Found. Your lost tracks will be in this playlist.

If the files still exist on the computer my FindTracks script may be able to help reconnect iTunes to them.

tt2

Hi iTunesIrksMeALot,

If you imported the exact same library, you may be able to search for duplicates and delete them all at once. The "Find duplicates" section here explains:

Find duplicates

You can find every instance of a song by the same artist anywhere in your iTunes library. For example, the same song could appear on the artist’s album and on a movie soundtrack.

You can also search for exact duplicates, in which the song, artist, album, and version are all the same (if, for example, you inadvertently imported the song twice).

Note: You can find duplicates for songs, movies, TV shows, and audiobooks.

1. In the iTunes app  on your PC, choose an option (Music or Movies, for example) from the pop-up menu at the top left, then click Library.

2. Select an item, then do one of the following:

* Find every instance of that item in your library: Choose File > Library > Show Duplicate Items.

* Find exact duplicates: Hold down the Shift key, then choose File > Library > Show Exact Duplicate Items.

After you find duplicate items, you can delete them if you want to declutter your library.

To see all items again, click Done in the top-right corner or choose File > Library > Show All Items.

Thank you for being part of the Apple Support Communities.

Kindest Regards.