Fix: Windows Activation Error 0x803fa067

Windows Activation Error 0x803fa067 stops users from activating Windows, leaving the system with limited features. This error indicates a failure in license validation, usually due to an invalid or reused product key. Common causes include hardware changes, such as a new motherboard, and mismatches between the Windows edition and the product key.

Additional causes can be trying to upgrade with a generic key, and using Volume License Keys or shared keys from unauthorized sources.

In this article, we will discuss different ways to solve this error.

Disconnect Internet Before Updating

Before you start, disconnect from the internet to stop Windows from checking your product key online during the update.

1. Right-click on the Network icon on the bottom right of the taskbar.
2. Click ‘Open Network and Internet settings‘.
   
3. Under ‘Change your Network settings‘, double-click ‘Change adapter options‘.
   
4. Right-click on Ethernet and click ‘Disable‘.
   

Activate Windows

1. Boot up your system.
2. Press Winkey + I to open the Settings window.
3. In the search box, type Activation.
4. Change the product key to the following (default key from Microsoft):

   VK7JG-NPHTM-C97JM-9MPGT-3V66T

   

5. Once you’ve entered the key, disable your internet connectivity.