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  1. Find your Windows product key - Microsoft Support

    A digital license is a method of activation in Windows 10 and Windows 11 that doesn't require you to enter a product key. Without one of these, you won't be able to activate your device.

  2. Difference between product key and activation code

    A product key is a unique alphanumeric code provided during the installation of Microsoft software (such as Windows or Office). It serves as a license key that validates your ownership of the …

  3. Activate Windows - Microsoft Support

    A digital license (called a digital entitlement in Windows 11) is a method of activation in Windows 11 that doesn't require you to enter a product key. A product key is a 25-character code used …

  4. Find your Office product key - Microsoft Support

    Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead.

  5. Product keys for Windows - Microsoft Support

    A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

  6. Activate Office for Windows - Microsoft Support

    A digital product key is transmitted to your PC, so you won't need or receive a printed product key. You activate Microsoft 365 by signing in with a Microsoft account.

  7. Where to enter your Office product key - Microsoft Support

    If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can …

  8. About Genuine Windows - Microsoft Support

    It pairs your product key or digital entitlement with your hardware configuration. Usually, you only need to activate Windows once, unless you make a significant hardware change.

  9. Reactivating Windows after a hardware change - Microsoft Support

    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 …

  10. Get help with product key errors on Office.com/setup

    If your product key is for a supported version of Office, the Virtual support agent will provide a link to download Office. The Virtual support agent can also let you know if your product key has …