Coming to your Windows computer soon ...and when it does, be prepared for some lengthy downloads and procedures. The download may appear to hang at times but don't give up or abort thinking that something must have gone wrong.
A lot will depend on the speed of the Internet connection and the speed of the computer. Both of those are pretty quick in my case but the update still took some hours. Another factor will be that the Microsoft servers will be very busy rolling out the update to as many computers as they can. Slowness will be experienced because of this too.