I did this update on 5 different PC's. One took only 5 minutes to complete, one took 15 minutes and the other three took almost an hour. I had one person call me and ask if he had done something wrong because the circle had been spinning for so long. I advised him to wait and after the one hour all updates were complete.
I just wonder why there is so much difference in the update/install time where all were running the latest version of WIN 10 before this latest.
In my case the two machines are on a 3 Mb DSL line so I could see the update time being slow but the other three were on 30 Mb cable lines.

Just a thought.
Regards,