Two nights ago one of my PCs at work spontaneously upgraded itself to W10. I had windows update set to notify when updates were available but not to download or install them. We leave the PC on overnight in the event I must log in remotely. The user account that was logged in is read-only and has no permissions for installation. We turned on the monitor in the morning to a screen that welcomed us to Windows 10.
I run a proprietary management software package that is incompatible with W10. Of course, the offending PC is the data repository for the network. The hours that it took to manually backup the data, roll back the upgrade, and then have my IT folks rebuild the network was expensive. We could not service our clients properly and I have incurred IT expenses for no reason.
I have searched the microsoft website for whatever settings need to be changed to prevent this from occurring again, and have found nothing. What do I do now to ensure this nonsense won't be repeated?
Thank you in advance for your assistance.
Vlad