
and I THINK I found the culprit: One of the updates that these computers installed today is KB3083710, which is a client update for Windows Update itself. This means that Windows either changed or deleted registry settings that GWX Control Panel had earlier put in place. Just came home this evening to find three of my Windows 7 computers had reverted to "Windows Update OS upgrades enabled" mode in GWX Control Panel.

Why the alarm? Late last night, GWX Control Panel author Josh Mayfield sent me an email: HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate įor most of you, that's as easy as re-running GWX Control Panel and clicking "Disable Operating System Upgrades in Windows Update." If you're using Group Policy, follow the directions in Microsoft's KB 3080351 to "Turn off the upgrade to the latest version of Windows through Windows Update." If you're setting the registry manually, make sure the following key has a Dword value of DisableOSUpgrade = 1. If you've used GWX Control Panel, gpedit/Computer Configuration, and/or direct changes to the registry to block the Windows 10 upgrade, you should take a moment and make sure that your block is still in place. Apparently an update released yesterday changed an important registry setting - DisableOSUpgrade - that prevented Windows 7 and 8.1 from proceeding with the forced march to Windows 10.

Those of you who are using the common methods for blocking Windows 7 and Windows 8.1's obnoxious Win10 upgrade procedure take note.
