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  1. Activate Windows - Microsoft Support

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

  2. Product activation for Windows – online & support telephone …

    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 three methods to which …

  3. Using the Windows Activation troubleshooter - Microsoft Support

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

  4. Find your Windows product key - Microsoft Support

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

  5. Get help with Windows activation errors - Microsoft Support

    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 …

  6. Difference between product key and activation code

    In summary, a product key is used during installation, while an activation code is used to activate the software afterwards. Both are essential for ensuring a legitimate and functional software …

  7. Activer Windows - Support Microsoft

    Apprenez à activer Windows à l'aide d'une clé de produit ou d'une licence numérique, à vérifier l'état de votre activation et à lier votre compte Microsoft.

  8. Activate Office for Windows - Microsoft Support

    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.

  9. Unlicensed Product and activation errors in Office

    The Microsoft 365 activation troubleshooter runs on Windows PCs and can help you identify and fix activation issues with Microsoft 365. Select the button below to start the Microsoft 365 …

  10. Change your Office product key - Microsoft Support

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