Just to add some info here.
Microsoft dropped support for Windows 7 and 8.1 early for some more recent Processors. Effectively the way this was done was such that if Windows Update detects a later model CPU, Windows Update will block all updates and will give you a dialog that encourages you to upgrade to Windows 10.
This issue can be bypassed, however- You see, Windows Update didn't come with that feature- it was part of it's own separate update. One can uninstall and block KB4012218 and KB4012219 which added this feature to Windows Update and Windows 7 will continue to receive updates even on unsupported processors.
There is also tooling to automate this on Windows 7 and 8.1, found
here, which works with said update installed. It effectively patches things so that the cached result that is used to check for CPU Support is always true. This lets you install all the updates that come out as if you had an earlier model "supported" processor.
Of course, one cannot expect any help from MS if you have issues.