This may not help (closing the stable door after the horse has bolted). But you might have other machines you need to protect. After the horrible KB2952664, Microsoft did correct its ways. Microsoft guidance is here: KB3080351 How to manage Windows 10 notification and upgrade options My short version: (1) Install both of these Windows updates: KB3050265 Windows Update Client for Windows 7: June 2015 KB3065987 Windows Update Client for Windows 7 and Windows Server 2008 R2: July 2015 (2) Then apply these two registry patches: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate] "DisableOSUpgrade"=dword:00000001 and Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Gwx] "DisableGwx"=dword:00000001 Bear in mind that it's a while since I used Windows 7 SP1. But this method did work cleanly to prevent surreptitious upgrades, or "offers" to upgrade (so kind!), from Windows 7 to Windows 10. The important point is that Microsoft added the ability to avoid a forced upgrade only with the two patches above (KB3050265 and KB3065987).
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