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Learn how to find a Windows product key for activation, and when you'll use a digital license instead.
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
Windows 7 and Windows 8.1: Product keys can typically be found in the confirmation email you received after purchasing Windows or in the box Windows came in. Learn more about finding your Windows 7 or Windows 8.1 product key. Find your product key to activate Windows.
If you used a product key to get to Windows 11, then you’ll need that key again after the hardware change. To find out how to locate your key, see Find your Windows product key. For more info about product keys and digital licenses, see Activate Windows.
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.
Find your Office product key. Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead. Using product keys with Office.
You’ll need a product key when you install Windows. To learn more, go to Find a product key.
For help finding your product key, see Find your Windows product key. If you have a valid product key, use it to activate Windows: Select Start > Settings > System > Activation .
For help with your product key, see Find your Windows product key. If the troubleshooter is unable to fix your issue, contact support. Note: Windows activation requires an internet connection. For more info, see Get online. Troubleshoot common activation issues.
Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.