Because I travel quite a lot for business, currently my iTunes library is stored on my work laptop. This is the third in a recent series of unreliable Dells (I recommend avoiding the D620) which also takes me up to my maximum number of authorised accounts. I also have a new iPhone which replaces an iPod touch. So, I'm thinking of rationalizing things a bit as follows: 1. De-authorize all systems currently on my iTunes account. 2. Moving my iTunes library to my MacBook at home (and also back up approx 5GB of purchased music to my iDrive. 3. Also keeping a copy of my iTunes library on whatever Windows laptop I happen to have (will be moving to a fourth Dell next week because my third has an over heating issue). So.... Two questions: 1. I'm sure I've seen a de-authorize all option in iTunes but can't find it today (I'm sure you can only do one of these a year but this will be my first time)...... Where should I be looking? 2. How does one move an iTunes library from Windows to Mac (did a Google and information seems scarce so I'm guessing not easily)? 3. Is it legal for me to keep my tunes purchased from iTunes on both a Mac and a Windows system?