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

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

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

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. There are two methods to which …

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. This article will help you …

You can also try our guided support in your browser to help with activation issues. I thought this device included Microsoft 365 or a non-subscription version of Office.

Linking your Microsoft account with your digital license allows you to reactivate Windows using the Activation troubleshooter whenever you make a significant hardware change.

How to change your product key to fix activation errors that can occur if you own and install multiple one-time purchases of Office..

The Product Activation Portal enables activation for a wide range of perpetual Microsoft products and supports both connected and non‑connected devices. This evolution ensures activation …

If activation fails, see What to try if you can't install or activate Microsoft 365 or Office for Mac. Installation notes for Microsoft 365 or Office 2024 on a Mac