So I play "IT guy" in a company that has no IT guys. I've run into two users that had the computer start the Windows 10 upgrade process while in the middle of doing work. Unfortunately, they only tell me once it reaches the black Windows 10 upgrading screen.
Is there any way to safely interrupt this upgrade without waiting for Windows 10 to install and then rolling it back? I've had these users lose 1-2 days of work because of this and I don't have the time to sit at each user's computer and install GWX Control Panel to block it (peer to peer network, no domain server so therefore can't prevent the upgrade through GPO)
I will be pushing out an e-mail to notify me immediately if a prompt like this shows up again, but should they fail to stop the upgrade from starting, what happens if we try to interrupt it? Can it be rolled back before Win10 is completely installed?