Learn how to check the Windows activation status if Windows 11/10 OS via Windows Settings. You can activate Windows or change product key if needed.

Fix Error 0xC004C003, 0xC004C003, The activation server determined the specified product key is blocked, on Windows 11/10, by following this guide.

If you are wondering about how to use the Windows 10 product key and get started with the activation on a free upgrade or a retail licence, the following are the details to help you with that ...

Microsoft introduces a tool to help you keep your free Windows 10 upgrade after you swap out your motherboard.

Here are a few more answers to some nagging questions about Windows 10 upgrades and activation in the post-Anniversary-Update era.

With Windows 10, Microsoft has rewritten the rules for how it performs product activation on retail upgrades of Windows, including the free upgrades available for a year beginning on July 29, 2015.

It's unclear as to why this works, but if you have a product code for an old version of Windows 7, 8 or 8.1 you should be able to enter this into a copy of Windows 10 and get an activation.