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When you buy a refurbished device running Windows 10, you'll need to activate Windows using the product key on the Certificate of Authenticity (COA) that's attached to your device. If your original hardware manufacturer (OEM) changed the motherboard for you, your PC should reactivate automatically.
Find your product key in the confirmation email you received after buying Windows 10 or Windows 11 in a digital locker accessible through the retailer’s website. A digital copy from a Microsoft website
Windows 11 and Windows 10: In most cases, Windows 11 and Windows 10 activates automatically using a digital license and doesn’t require you to enter a product key. 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 ...
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 upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.
For example, a product key for the Enterprise edition of Windows 10 can't be used to activate Windows 10 Home or Windows 10 Core editions. Enter a product key that matches the version and edition of Windows installed on your device or buy a new copy of Windows from the Microsoft Store.
If you don't have a product key or digital license, you can purchase a Windows 10 digital license after installation finishes. Follow these steps to make a purchase: Select the Start button, then select Settings > Update & Security > Activation .
Customers who are already running Windows 10 Education can upgrade to Windows 10, version 1607 through Windows Update or from the Volume Licensing Service Center. We recommend Windows 10 Education to all K-12 customers as it provides the most complete and secure edition for education environments.
To find your Windows product key, see Find your Windows product key. If you have a digital gift card that's good for a game or app, see Redeem a gift card or code to your Microsoft account . To buy an app or game, visit Microsoft Store online , on Windows and Xbox.
If you’re installing Windows 10 for the first time, you’ll need to enter a valid Windows 10 product key or buy a full version of Windows 10 during setup for this tool to work. If you’ve previously installed Windows 10 on your device, you should have a digital license and Windows 10 will automatically activate without entering a product key.