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

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

See Reactivating Windows after a hardware change for more info about reactivating Windows 11 after making a significant change to your device's hardware. See Activate Windows 7 or Windows 8.1 for …

Windows Activation Technologies helps you confirm that the copy of Windows 7 that is running on your computer is genuine. Additionally, Windows Activation Technologies helps protect against the risks …

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

To activate a Microsoft product, select either the Internet option or the telephone option in the Product Activation Wizard. With Internet-based activation, Microsoft servers process the activation and …

Windows Activation Technologies helps you confirm that the copy of Windows 7 that is running on your computer is genuine. Additionally, Windows Activation Technologies helps protect against the risks …

When you get a message that says Windows can't be activated, there are several possible reasons why. Select any of the following topics to see some typical reasons for activation difficulty, along with …

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

Describes a problem in which you receive an error message when you try to use the Windows Activation wizard to activate a copy of Windows Vista or Windows 7. Resolutions are provided.