Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Learn how to activate Windows using an internet connection, automated system, or live support advocate.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Unlike other versions of Windows 10, Windows 10 Pro EDU and Windows 10 for Workstations must be activated over the Internet. Until your PC connects to the Internet, you won’t receive notifications or …

If you're having trouble activating Windows 10, follow these steps to fix activation errors: Confirm that your device is up to date and running Windows 10, version 1607 or later.

Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.

Learn how to use the Activation troubleshooter to resolve common activation issues in Windows.

If you make significant hardware changes on your device, such as replacing your motherboard, Windows will no longer find a license that matches your device, and you’ll need to reactivate …

In this case, you’ll need to provide a valid 25-character Windows 10 product key or purchase a Windows 10 digital license to activate. To buy a digital license online, select Start > Settings > Update & …

However, if a product key is required, it can usually be found in the confirmation email you received after purchasing Windows, or in the box Windows came in. Microsoft doesn't keep a record of purchased …