How to find Windows 10/11 Pro product key to activate the upgrade

readerprocess

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I'm following the instructions to upgrade from Windows 11 Home to Windows 11 Pro. The process requires a Windows serial number at a certain step:

If your PC is running the latest version of Windows 11 and you purchased Windows 11 Pro or Windows 11 Pro for Workstations, changing editions is straightforward by entering a product key.

From the desktop, select Start > Settings > System > Activation. Then select "Change product key" and enter your Windows 11 Pro or Windows 11 Pro for Workstations product key. If the key is valid, you'll be asked to confirm the edition change, and Windows will perform it for you.

However, the email I received after purchasing the Windows 10/11 Pro upgrade only contains an order number and no product serial key. How can I find or obtain the product key to complete the upgrade?
 

alexa23

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You can try noxkeys.com they offer genuine Windows 10/11 Pro keys for around $13. Or, check your current key using Command Prompt:

wmic path softwarelicensingservice get OA3xOriginalProductKey

If no key shows, purchasing from a trusted source like NoxKeys is a simple option.
 

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