Authorisation of computer
I just bought a song on itunes and when i tried to play it, it said this song cannot be played until you authorise your computer. It's the same computer i have been using successfully for about 5 years now. so i authorised it again and it came back saying this computer has already been authorised. So i tried to play it again then the message appeared on screen again saying it has not been authorised. So it's' going round in circles. What can i do about it? Thankyou.
Windows, Windows 10