When starting iTunes from my wife's or daughter's account it says 'Filename already exists', but does eventually start. (also when installing iCloud on my user as a test, logging in with both my credentials or those of my daughter) With my user everything is working perfect. I have installed iTunes for all three users, plus iCloud for my daughter. I have a new Windows 10 computer with three accounts: my wife, myself (both administrator rights) and my daughter (family member). Login iTunes / iCloud fails on Windows 10 with different user accounts.

Is this a known problem? Is there any solution? I have iTunes 12.12.4 and no new updates available. I figured that maybe there was a delay on the server and that the problem would soon go away. To authorize this computer you must first deauthorize one of the other computers.' You have already authorized 5 computers with this Apple ID.

I try to authorize my computer again and get the same error message: 'You cannot authorize more than 5 computers. Now I am down to 2 (my iPad and an old MacBook). I go to iTunes -> Account -> View My Account -> Manage Devices and de-authorize all devices that I am not currently using. When I tried to authorize this instance of iTunes, I was told: 'You cannot authorize more than 5 computers. I don't know why, but my guess is that after a Windows update, iTunes no longer recognizes the computer as being the same as before.

One day, my iTunes on Windows said it was not authorized and that I needed to authorize. These were all authorized more than a year ago (much longer than the 90-day change limit). Cannot authorize PC with iTunes even after deauthorizing - it keeps saying 'You have already authorized 5 computers with this Apple ID' Recently I had 5 (current and past) devices authorized on iTunes, including a Windows 10 PC.

Update to the latest version of itunes