This issue has just started with the past three months on windows 10 machines. In the past if i wanted to reassign a machine in my domain to another user on the domain I would just go into the control panel of that particular machine and go to "manage user accounts" as the network admin. Add that user along with our domain. Windows 10 appears to accept this no problmes. Now when I log out as the domain admin and log in as the added user to the pc and the desktop is black with no wallpaper, the start menu does not work and there is only a recycling bin on the desktop. This has happened on three of my windows 10 machines now. Two while trying to add a user to the machine and one in a case where i moved the user off of one domain, joined him to a workgroup and then joined him to another domain at a different location. The only remedy I've found is to do a complete reformat of the machine at which time i have to hunt down all my software installed on the machine OEM and try to get it all reinstalled.....also after windows 10 does the reset the search function near the start menu does not work initially I have to use win + r and "run" commands to get to the control panel etc etc, until windows goes through a bunch of updates. Some may point to GP but the one machine was unjoined from this domain and added to a different domain......so.