2. If Windows 8.1 was on your laptop when you bought it, you must use your laptop's dedicated recovery media to reinstall Windows or ask the laptop vendor for help with the product key. However, I suspect we are not talking about an OEM copy. In your title, you've said "Windows 8" while in your message body, you exclusively said "Windows 8.1". 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. 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 Generic keys (aka: "default keys") for Windows 10 from Microsoft will allow you to install or upgrade to a specific Windows 10 edition you want, but will not activate it. Using a generic key can be helpful if you wanted to install or upgrade to a specific Windows 10 edition for evaluation or testing on a PC or virtual machine, or just don't 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. How to verify if you downloaded or installed the Windows 10 November Update. If you do: Press Windows key + X. Click Command Prompt (admin) Enter the following command: wmic path SoftwareLicensingService get OA3xOriginalProductKey. Hit Enter, this will generate your product key. Click Start > Settings > Update & security > Activation > Change Even if you don’t have a product key, you’ll still be able to use an unactivated version of Windows 10, although some features may be limited. : Download Windows 10 directly from Microsoft’s website. : Open the downloaded file and begin the installation. : A window will pop up asking you to enter a product key during the installation. The answer to your main question, is yes, you can use your Windows 7 Product Key to install Windows 10. Keep in mind, you need to install the edition of Windows 10 that corresponds with your Windows 7 license on the new computer. Windows 7 Starter, Home Basic, Home Premium, Windows 8.0 Core, Windows 8.1 Core will install Windows 10 Home. Press Windows key + X then click Run, then type: slui.exe 4. 2. Next press the 'ENTER' key. 3. Select your 'Country' from the list. 4. Choose the 'Phone Activation' option. 5. Stay on the phone (do not select/press any options) and wait for a person to help you with activation. If you have one copy of Windows and you installed it on more than one PC, activation might not work. The product key has already been used on more PCs than allowed by the Microsoft Software License Terms. To activate new additional PCs, you must buy a new product key or copy of Windows for each one. 1AxgfA.

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