‘Knowledge is the key’

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It is a wise idea to keep your Windows product key handy: you can use it to upgrade your OS to a newer version or to activate your Windows should the need arise.

Dec 16, 2018 Here is an article on the change that allows the use of a Windows 7 or 8 product key to install Windows 10. This change was made to allow previously licensed users to upgrade to Windows 10 whilst performing a clean install (rather than a traditional upgrade install). Change Key Functions on Windows 1. Editing the Registry Entry. Editing the registry keys is a tedious method to remap keys and can lead to small problems if you are not being cautious. I would advise taking a backup before going ahead. If you have no idea about Windows backup, check out this article.

The good news is, changing the product key in your OS, be it Windows 7, 8, 8.1, or 10, is a simple and straightforward procedure. So, if the question “How to re-enter my Windows product key?” is the reason you ended up on this page, you should move on to the instructions below and carry out what is stated there.

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How to enter the Windows 10 product key?

If you are running Windows 10, you can rest easy knowing that Microsoft has done its utmost to simplify the procedure you are willing to perform. There are no fewer than 6 ways to reach your system settings and change your product key in Windows 10. To begin with, make sure you are signed in as an administrator. If you are, feel free to choose any of the following methods:

Option 1. Change your product key in Windows 10 via your system settings menu:

  1. Simultaneously press the Windows logo key and X key. This shortcut is designed to evoke the Quick Access menu in Windows 10.
  2. Select System from the menu.
  3. From the left-pane menu, select the About option.
  4. Navigate to the right pane.
  5. Scroll down until you arrive at the “Change product key or upgrade your edition of Windows” link. Click this link to continue.
  6. You will be taken to the Activation screen.
  7. From the right pane, select Change product key.

Follow the on-screen prompts to complete the process.

Option 2. Change the Windows 10 product key via the Settings app:

  1. Press the Windows logo key + I keyboard shortcut.
  2. Select Update & Security.
  3. Move down to the Activation option.
  4. Click Change product key.

Enter your product key and follow the instructions to complete your task.

Option 3. Change your Windows 10 product key via Control Panel

  1. Click on the Windows logo icon that is always present on your Taskbar.
  2. Select Control Panel. Then click on System and security.
  3. Click on System to proceed.
  4. Navigate to the Windows activation section.
  5. Locate and click the Change product key link.

Do what you are asked to get the job done.

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Option 4. Run Slui.EXE to enter your product key

  1. Press the Windows logo key + R shortcut in order to evoke the Run app.
  2. Once Run is up, type slui.exe 3 and click OK or hit the Enter key.

Enter your 25-digit product key and press Enter.

Option 5. Run changepk.exe to input your product key in Windows 10

  1. Open the Run app by pressing the Windows logo and R keys.
  2. Tap in changepk.exe and click OK.

Now you can enter your product key.

Option 6. Change the Win 10 product key, using Command Prompt

  1. Press the Windows logo key + X shortcut.
  2. From the quick-access menu, select Command Prompt (Admin).
  3. Type slmgr.vbs /ipk <Input your product key here> and hit Enter.

You have successfully entered your Windows 10 product key.

How to change your product key in Windows 8?

Option 1. Use Control Panel

The easiest way to change your product key in Windows 8 is via Control Panel. These are the instructions for you to follow:

  1. Open your Start menu and locate Control Panel. Click on it.
  2. Click on System and security. Then select System.
  3. Click “Get more features with a new edition of Windows”.
  4. Select “I already have a product key”.
  5. Then enter your product key and click on Next.

Option 2. Use Command Prompt

You can also change your product key in Windows 8 via an elevated Command Prompt window. Here is how:

  1. Press the Windows logo + X keyboard combination.
  2. Select Command Prompt (admin).
  3. Type the following: slmgr.vbs -ipk <Your Windows product key>.

Press Enter. After your new product key has been validated, you are good to go.

Change your product key in Windows 8.1

This set of instructions is for those running Windows 8.1:

  1. Press the Windows logo + W keyboard shortcut.
  2. Once the Charms bar is up, move to the Search area and tap in PC settings.
  3. Select PC and devices and proceed to PC info.

There you can enter or change your product key.

How to change the product key on Windows 7?

Is it possible to change the Windows 7 product key? If you are looking for the answer to this question, you have come to the right place. The answer is yes, definitely.

Option 1. Configure your PC properties

  1. Open your Start menu.
  2. Right-click Computer.
  3. Click Properties.
  4. Select Change Product Key.

Finally, enter your new product key and click Next.

Option 2. Use your Command Prompt

  1. Open your Start menu.
  2. Locate Search and type cmd.
  3. Select Command Prompt (Admin) from the search results. If this option is not available, right-click Command Prompt and choose to run it with administrative privileges.
  4. Type C:WindowsSystem32> slmgr.vbs -ipk “Input your product key”. Press Enter.
  5. To activate your Windows, type C:WindowsSystem32> slmgr.vbs -ato. Press Enter.

We hope you have successfully changed your product key. If you have upgraded to a newer version of Windows, ensure that all your drivers are up to date. This is important since your system may start to malfunction otherwise. To this end, it is a good idea to update all your drivers at once – which is possible if you have a dedicated tool such as Auslogics Driver Updater at your disposal.

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If you are having issues changing your Windows product key, do not hesitate to leave your comment below. We will do our utmost to help you!

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Before upgrading to Windows 10 Pro, make sure your device is up to date and running the most recent version of Windows 10 Home. For more info about how to keep your PC updated, see Windows Update: FAQ.
To upgrade from Windows 10 Home to Windows 10 Pro and activate your device, you'll need a valid product key or a digital license for Windows 10 Pro.

Note: If you don't have a product key or a digital license, you can buy Windows 10 Pro from Microsoft Store. Select the Start button, select Settings > Update & Security> Activation , and then select Go to Microsoft Store. From here, you can also see how much this upgrade will cost.
Open Activation settings


Use the following chart to determine which activation method you'll use:

If you got Windows 10 by..

Activation method

Upgrading to Windows 10 for free from an eligible device running a genuine copy of Windows 7 or Windows 8.1.

Digital license

Buying a Windows 10 Pro upgrade from the Microsoft Store app and successfully activated Windows 10.

Digital license

Being a Windows Insider and upgrading to the newest Windows 10 Insider Preview build on an eligible device that was running an activated earlier version of Windows and Windows 10 Preview.

Digital license

Buying genuine Windows 10 from the Microsoft Store app.

Digital license

Buying a copy of Windows 10 from an authorized retailer.

Product key

Find it on a label inside the Windows 10 box. A digital license will be given to your device for Windows 10 based on the valid product key you entered.

If you bought your PC from a manufacturer, the manufacturer, not Microsoft, must provide a product key.

Buying a digital copy of Windows 10 from an authorized retailer.

Product key

Find it in the confirmation email you received after buying Windows 10 or in a digital locker accessible through the retailer’s website.

A digital license will be given to your device for Windows 10 based on the valid product key you entered.

Having a Volume Licensing agreement for Windows 10 or MSDN subscription.

Product key

It is available through the web portal for your program.

Buying a new or refurbished device running Windows 10.

Product key

It is preinstalled on your device, included with the device packaging, or included as a card or on the Certificate of Authenticity (COA) attached to the device.

If you bought a refurbished PC, the refurbisher, not Microsoft, must provide you a product key.

Buying from www.microsoft.com

Product key

Find it in the confirmation email that contains the order history.

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If you're having trouble locating your product key, see Find your Windows product key and Find your Microsoft downloads and product keys.

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If you're ready to upgrade, select one of the following headings to get started: