Despite it being in the terms of agreement, I'd say that's what you get for using a shoddy service. Things like iTunes, Google Play Music, Apple Music and the likes are awful. I'm finding Groove Music in Windows 10 to be alright though. I've actually used iTunes and Apple Music in the past and it was just utter crap. Crashing, not doing what I wanted, not letting me tag music the way it's supposed to be tagged, etc. And once I wanted to uninstall the software, it simply threw an error every time, with no way to get rid of it.
Apple is alright with most things, but their software is complete crap if you ask me, at least for Windows. It wouldn't hurt to check for Malware, OP, although I honestly doubt it's after your music, if you have Malware at all.
Edited by Foldingchair, 14 May 2016 - 08:53 AM.