How to Apply Product Keys for Windows 11 and Office 2021

Knowing how to apply your key correctly is crucial to ensuring a smooth and seamless activation process. Whether you’ve bought a key for Windows 11 (Home or Professional) or Office 2021 (Home & Student, Home & Business, or Professional), this guide will walk you through the steps to make your activation journey effortless.

Understanding Your Product Key

Before diving into the activation steps, it’s essential to understand the different types of keys available and their restrictions:

  1. OEM Keys: These are tied to the first computer you activate them on. Once activated, they cannot be transferred to another device or used to upgrade from Windows 11 Home to Professional.
  2. Online Activation Keys: Similar to OEM keys, these can only be used on one PC/motherboard. Additionally, these keys cannot be activated in Turkey.
  3. Retail Keys: These are the most flexible, allowing transfers between different devices.

Applying Your Product Key

Windows 11 (Home and Professional)

  1. OEM Key:
    • Step 1: Navigate to Settings > System > Activation.
    • Step 2: Click on “Change product key”.
    • Step 3: Enter your 25-character OEM key and follow the prompts.
  2. Online Activation Key:
    • Follow the same steps as for the OEM key. Note, Windows 11 online activation keys are non-transferable and cannot be activated in Turkey.
  3. Retail Key:
    • Step 1: If you’re upgrading from Windows 11 Home to Professional, go to Settings > Update & Security > Activation.
    • Step 2: Select “Change product key” and enter your retail key.
    • Step 3: Follow the on-screen instructions to complete the activation.

Office 2021 (Home & Student, Home & Business, Professional)

  1. OEM and Online Activation Keys:
    • Step 1: Open any Office app (Word, Excel, etc.).
    • Step 2: In the activation wizard that appears, enter your product key.
    • Step 3: Follow the prompts to complete the activation.
  2. Retail Key:
    • Step 1: Visit the official Office website.
    • Step 2: Sign in with your Microsoft account, or create one if you don’t have one.
    • Step 3: Enter your product key when prompted.
    • Step 4: Download and install Office on your device.
  • Read the Product Description: Ensure you are aware of the type of key you purchased and its specific activation instructions. This will help you avoid invalidating your key.
  • Check Compatibility: Ensure that your device meets the necessary requirements for Windows 11 or Office 2021.

Not sure? Feel free to contact us.


Can I transfer my OEM key to a new computer?

  • No, OEM keys are tied to the first computer they are activated on and cannot be transferred.

How can I upgrade from Windows 11 Home to Professional?

  • You can upgrade using a retail key. Go to Settings > Update & Security > Activation and enter your retail key to upgrade.

What should I do if my product key is not working?

  • Ensure that you have entered the key correctly. Double-check the type of key and follow the specific instructions. If problems persist, contact our support team for assistance.

By following these instructions and understanding the nuances of your product key, you can ensure a hassle-free activation process. For more details, always refer to the product description and keep this guide handy.

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