Windows 10 product key not working on Windows 11

If your Windows 10 product key is not working on Windows 11, check the Windows Edition, your activation status, and then ...

iMessage Won't Activate In iOS 26? Here's How To Fix It, According To Apple

If you're having trouble getting iMessage to work after upgrading to iOS 26, Apple is aware of the issue and has shared a fix on its support site.
eTeknix

Windows 7 & 8 Keys No Longer Activate Modern Versions of Windows

Microsoft previously offered a free upgrade offer to Windows 10 which ended back in 2016 however, users with old Windows 7 or 8 keys could get themselves onto Windows 10 using the free installation ...
Ars Technica

Microsoft will stop old Windows product keys from activating new Windows installs

At least for now, though, it seems like this change will only apply to future Windows versions. We were able to activate a fresh Windows 11 Pro 22H2 install with a Windows 8 Pro product key as of this ...
Windows Central

Microsoft kills loophole that let Windows 7 keys activate Windows 11 and 10

Microsoft is closing the loophole that allowed older Windows product keys to activate Windows 10 and Windows 11. This loophole has existed since Windows 10 first launched as a "free" upgrade for ...