can't play purchased music
i have recently uninstalled and reinstalled Itunes onto my windows PC. after doing so several of my purchased songs wont play, a notice comes up saying the computer is not authorised to play the song and tells me to input my apple ID and password in order to authorise it, however it makes no difference, when i try to play the song, the note pops up again. Can anyone help please?
Windows, Windows 10