If anyone is still on Windows 7... you can still upgrade to Windows 10 for free (though it is not advertised).
https://www.zdnet.com/article/heres-how-you-can-still-get-a-free-windows-10-upgrade/When it appeared that MS was going to automatically upgrade people to Windows 10 (which might have just been another rumor), I turned off updates, so that I would stay on Windows 7.
Recently, that computer has become unusable (not sure why and that doesn't really matter for this discussion).
I could not run any updates (to W7). Programs took 10 minutes to load.
I decided to reset the computer (from the recovery partition).
F8 was supposed to bring up the recovery screen - it would not.
I tried the steps in the above article to go to W10, but it would not run.
I managed to find a W7 recovery disc I had made when the system was new - which allowe me to get to the recovery partition - and reset to what it was when it was new (2012).
The W7 update function would not return any available updates.
I found A Youtube video (of course) that explained what to do to get the W7 updates to work
(about the 4th solution worked for me)
...and I got W7 upgraded as far as it would go (168 updates)..
I then tried the W10 upgrade and it failed with an error - which again was solved with Prof Youtube.
https://www.youtube.com/watch?v=WelZFpjVjMg....and the Windows 10 upgrade "took" (a fully activated copy - from the original W7 activation)
If anyone needs it, I will answer any question I can, but keep in mind...I am not your tech support. Enter at Your Own Risk.