### Steps to Retrieve the Firmware-Embedded Windows Activation Key

1. **Open an Elevated PowerShell Prompt**
   - Search for "PowerShell" in the Start menu.
   - Right-click on "Windows PowerShell" and select **Run as Administrator**.

2. **Run the Command**
   - In the elevated PowerShell window, enter:
     ```powershell
     (Get-CimInstance -query 'select * from SoftwareLicensingService').OA3xOriginalProductKey
     ```

3. **View the Output**
   - If the device has a firmware-embedded activation key, it will display in the output:
      ```CMD
      C:\Users\sumonhome_iv>powershell
      ```
      ```PowerShell
      Windows PowerShell
      Copyright (C) Microsoft Corporation. All rights reserved.

      Try the new cross-platform PowerShell https://aka.ms/pscore6

      PS ...>(Get-CimInstance -query 'select * from SoftwareLicensingService').OA3xOriginalProductKey
      ```
      ```PowerShell
      XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
      ```
   - If blank, there is no embedded key. Most modern OEM devices for Windows have this feature.