66 votesEric commented
This also occurs on our Win10 In-place upgrade TS as well as the Win10 Feature upgrades TS. We put a reboot in early on the in the TS because we see a lot of errors happen if the OS is not rebooted 1st. But then it just sits at the login prompt waiting for the Agent to initialize and continue on with the TS. Users think its already finished and try to login causing interference with the running TS.