I just did a factory restore of my Windows 7 PC last night in preparation of the Windows 10 update. After finishing 4 years of Windows Updates (eventually), I wasn't offered an opportunity to upgrade to Windows 10 via Windows Update. Apparently, it's given out at random and you can't manually request it.

In order to manually update, you apparently have to download the Windows 10 ISO (https://www.microsoft.com/en-us/software-download/windows10I... ) and create a boot media? And some are saying that this doesn't count as an "upgrade" for the Win7/Win8.1 Product Key. Maybe.

The Windows 10 upgrade path is more confusing than it needs to be.