iTunes just rejected to play a song that I purchased 3 years ago, since it told me I need to authenticate my current computer.
Instead of trying to figure out what is broken with the Apple authentication for that song I just went ahead and bought it again on Amazon. Without CRM.
Apple is notorious for having one of the worst user management systems for their online services. The documentation of my Apple ID changes and resets
spans many pages. There are none for other systems and services that I used equally long.
Funny how one company can be so great in a couple of areas and fail so consistently in others.