There are two activation methods in Windows 11/10. The new Digital Entitlement and the usual Product Key Activation methods. This post throws light on the subject.

Microsoft has confirmed that Windows 7 and 8 keys can no longer activate any Windows 11 edition or version, not just Canary builds, as reported in September. However, Windows 10 keys are still valid.

For any Windows 10 version, including version 2004 (aka the May 2020 Update), here's everything you need to know before you repair, reinstall, or upgrade -- including details about activation and ...

Windows Activation Troubleshooter will help you troubleshoot & fix activation issues on your Windows 11/10 Access it via Settings & run it.

Windows 10 Pro licenses are being deactivated due to an ongoing issue with Microsoft's activation servers.

You need a 2012r2 KMS key to activate both hosts and clients at 8.1 level, do you have a valid SA on your 2012 license? Otherwise you will have to use a different host for KMS duties.

Restore your Surface Pro to original factory settings or reinstall Windows 8.1 while keeping your files.

Software & Apps Windows 7, 8, 8.1 keys can now activate Windows 10 Microsoft makes it easier to activate Windows 10 with support for older OS keys.

With Microsoft still allowing Windows 10 to activate with old Windows keys, users may find it less expensive to purchase a Windows 7 or Windows 8/8.1 license online.

Just like on Windows 7 your desktop will be plain black with a “watermark” indicating that you need to activate or license your copy of Windows 8.1.