Why does iTunes continually ask me to authorize my computer?

I just recently bought an album on iTunes and I have a weird problem. All of the songs (18 in all) except for one, play perfectly fine. When I try to play it, it says "This computer is not authorized to play "". Would you like to authorize it?" It prompts me to sign in with my Apple ID, which I did. Then it says "This computer is already authorized." I have no clue how to fix this! I've tried the steps outlined in iTunes: Missing folder or incorrect permissions may prevent authorization and iTunes repeatedly prompts to authorize computer to play iTunes Store purchases, but neither of them work. Any suggestions?

Solution 1:

In the end, deleting all the offending track and re-downloading it was the only thing that worked. Why I didn't think about this at first, I don't know, but it worked!

Solution 2:

JUST found the solution to my nearly year long battle with iTunes and the: You are not authorized. You're already authorized issue. Just adding this to spread the word that Ctrl +b -> Edit -> Preferences -> Advanced -> Reset Cache worked for me.

Every time iTunes started it thought it was freshly installed and prompted me to go through the tour, set the default music player, and authorize (each time saying it was already authorized). It wasn't just one song, it was about 50% of my music and 100% of my movies. I had already tried- deauthorizing then authorizing, uninstalling, reinstalling, deleting that SC- folder and restarting -- nothing worked until I cleared the cache.

Solution 3:

Here's what worked for me:

1) Right click the album or song. The first option that appears is "Remove Download"

2) Click "Remove Download" and blue cloud icons should appear next to the song or songs.

3) Click the icon to download the song. The cloud icon should disappear after the song is downloaded.

4) Click on the song to make sure it plays. If there are more songs with the issue, repeat this process.

Solution 4:

What worked for me was in iTunes, top right corner on click on down arrow, and then Account info, then manage devices in iCloud. This was very different from the authorised computers under STORE in itunes. Once I deauthorised all, I could then authorise my computer. Big thumbs up to Apple support for that solution, will try to get them to update their support pages with that fix.