Fix: Windows Activation Error 0x803fa067

The error 0x803fa067 can be caused by a bogus Windows copy or a previously installed update that altered your system files due to which users are not able to upgrade their Windows. When Windows 10 was pushed out, you could easily upgrade your Windows 7 or 8 to the newest in the market if your current copy was genuine. Generously, Microsoft also allowed the users to upgrade to Windows 10 Pro edition.

However, during the upgrade process, some users encountered the 0x803fa067 error. The lack of a solution and no resolving response from Microsoft made most of the people buy a new digital license. Fortunately, there’s a solution available now which is quite simple and can resolve your issue in minutes. Before we get into the details of the fix, let us put forth the causes.

Windows Error 0x803fa067

What causes Windows 10 Activation Error 0x803fa067?

The error 0x803fa067 occurs when you upgrade your Windows 10 Home to Windows 10 Professional using a generic key. Here are the following causes of the error –

  • Counterfeit Windows copy. If your copy of Windows is not genuine, you are destined to get this error as the default license key for Windows 10 Pro is not going to work for you.
  • Recent Windows update. If you have recently updated your system before upgrading, the error might have popped because of it.

This generic error has only one solution that has proven effective and worked for the users. Unlike the other activation errors, if this sole solution doesn’t work for you, you’ll probably have to buy a new digital license as there is no other fix that you can apply to overcome the error.

Disconnecting internet before updating

Being the only solution out there, it is pretty straightforward and easy. The essence of it is; you will have to unplug your ethernet cable or disable your Wifi before you upgrade your system. Here’s how you are going to have to do it:

  1. Boot up your system.
  2. Press Winkey + I to open the Settings window.
  3. In the search box, type in Activation.
  4. Change the product key to the following (default key from Microsoft):
    Change the product key
  1. Once you’ve entered the key, disable your internet connectivity.

How to Disable Internet Connectivity?

In order to disable your network card, do the following:

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

Finally, start the upgrade and your issue should be solved.


Kevin Arrows

Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.