iTunes Error -42100 (RARE?)

Hello everyone, today I attempted to buy MUSE's The Resistance album for $7.99. Once the songs finished downloading (which they didn't), iTunes popped up with an error 42100. I did not get my money back, and the album and songs don't show up in my library. Even checking the store, it said that all downloads were completed, and once I clicked "buy" again, it said that I already downloaded it. This was the text along with the error.

There was a problem downloading “Uprising / The Resistance / Muse”.
Please try reinstalling iTunes and try again."

I tried clicking the little restart button, but to no avail, and every single song in the album gets the error, including the LP itself. If this can't be fixed, I would feel quite ripped off, since the purchase was made using a gift card that a friend gave me for my birthday. Please help, Google isn't.!

Thank you.

EXTRA: I downloaded a different single from my iPod Touch along with like two apps, and it was all good.

Message was edited by: eLeetmachine