Windows 10 requires activation to verify you're running a genuine copy; a unique product key is used to ensure the a single licensed copy of Windows isn't being used on more than are allowed.
Occasionally, you may have to change the product key. If you're getting Windows 10 for the first time and a product key wasn't provided during the installation, or a generic key was used to upgrade, you'll need a new valid product key to activate the operating system.
In this Windows 10 guide, you'll learn five ways to bring up the Windows activation tool to change the product key on your computer.
How to change Windows 10's product key using Settings
If the activation process completes successfully, you'll get the 'Windows is activated' message.
How to change Windows 10's product key using Control Panel
Similar to the Settings app, if the activation process completes successfully, you'll get the 'Windows is activated' message.
How to change Windows 10's product key using Command Prompt
Windows 10 Pro Product Key Generator
If you typed the product key correctly and the process completes successfully, you'll see a dialog box reading 'Installed product key YOURP-RODUC-TKEYX-XXXXX-XXXXX successfully.'
How to change Windows 10's product key using SLUI 3
If the activation process completes successfully, you'll get the 'Windows is activated' message.
How to change Windows 10's product key using CHANGEPK
If the activation process completes successfully, you'll get the 'Windows is activated' message.
Alternatively, you can use change the product key using changepk.exe using the Command Prompt as well. Here's how:
Windows 10 Pro Product Key 64 Bit
Wrapping things up
While for the most part, you'll be using the Settings app to change the product key on Windows 10, if the option isn't available or if you're looking to create a script to change the product key on your computer, it's good to have different alternatives.
Windows 10 Pro Product Key 64-bit
If you're trying to upgrade the operating system by purchasing a new license from the Windows Store, everything regarding the product key will be handled automatically for you.
Also, remember that you must be signed in with an administrator account to change your system's product key, and you'll need an internet connection to complete the activation.
In the case, you recently made significant hardware changes to your PC, and Windows 10 won't activate, you can use the Activation Troubleshooter to re-activate your copy of Windows 10.
Although this guide is specific to Windows 10, the Control Panel, slui.exe, and slmgr.vbs methods that we're showing you here will work to change the product key on Windows 8.1 or Windows 7.
More Windows 10 resources
For more help articles, coverage, and answers on Windows 10, you can visit the following resources:
You copied a Windows 10 Pro off the Internet (usually a volume license - organization - key) and changed on a Windows 10 Home installation. Windows 10 Pro is not free. If this is what you did, you will need to reinstall the previous edition or version you were running. You inadvertently installed the wrong edition.
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