I upgraded my sister's laptop and installed her Windows 10 I thought that the free upgrade time would be over…
So I bought a new Windows 10 Key. After installing but it was now simply activated xD is the normal and you have to later iwann enter a new key or is now really easy as that would be sad, because I've got the key.
The system is a bit weird, sometimes it works, especially if you install older Win10 versions. Do all updates and look then obs is still activated. Sometimes such a version of Win 7 Pro turns into Win 10 Home, and sometimes it is not activated anymore.
This is actually a bit intransparent, what Microsoft does there. Yes, the free upgrade period is over. Nevertheless, you can - for whatever reason - sometimes still upgrade for free. But it is not really predictable. So you probably do not need the Key at first, but usually it does not fall, maybe you need it again later, or you sell it to someone you know and trust.
The free upgrade to Windows 10 was temporary for most users. However, users who rely on assistive technology could purchase the Windows 10 upgrade for a little while longer.
In other words, anyone who has a Windows 7 or Windows 8 / 8.1 license, currently upgrade to Windows 10 for free, even if officially not communicated by Microsoft.
Although Microsoft will never admit it, the company itself has a great interest in having as many users as possible use the latest version. However, this basically applies to commercial software offers.