Windows 10: Cannot reactivate windows on new motherboard. Error code: 0x803FABBA

Hello. Recently, I faced a problem during windows activation specifically as follows: It all started with my 1st motherboard. It was broken, could not be started. I bought 2nd motherboard. Then I activated windows 10 on that motherboard successfully with digital license linked to my account. I removed the old device in my account settings perhaps it was my mistake. Unfortunately, it didn't take long for my 2nd motherboard and CPU to fail as well. I received a 3rd motherboard and another CPU to replace. When I reactivate windows on this motherboard, the server shows only the 2nd motherboard i

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Unable to reactivate Windows after changing Motherboard

Hi,



Thank you for writing to Microsoft Community Forums.



I understand that after changing the Motherboard you are unable to activate Windows. I’ll help you with the issue.



However, please let us know:

• What is the error message you receive when you try to activate Windows?
  
• Did Windows 10 come preinstalled on your computer?
  
• Were you using a Microsoft account to login to the computer?
  

Ideally, if Windows 10 comes preinstalled on the computer, the Product key is embedded in the Motherboard. In case Windows is reinstalled on the computer, it should get activated automatically. However, if any hardware changes (such as Motherboard
or hard drive) is done on the computer, Windows will not be able to identify the license.



You may want to refer the troubleshooting steps mentioned in the article

Reactivating Windows 10 after a hardware change.



If you are receiving an error code, you may want to check the troubleshooting steps as per the error code mentioned in the article

Get help with Windows activation errors.



If you still face issues, do not worry, you can get in touch with our Activation team and they will help you with the issue. Please refer the article

Global Customer Service phone numbers to get the Customer support number as per your country.



Regards,

Nikhar Khare

Microsoft Community - Moderator

 

BIOS error codes

So I have motherboard with installed small LED screen, which presents BIOS error codes.

Where can I find a list of those errors. And I don't mean beep codes, but the "number" codes.

Ex after installing sound card, the motherboard startup fails with the code 15.

Example picture of code is here.

 

New Motherboard and Reactivation


I did a clean install using the free upgrade offer a few weeks ago. Sorry to say, but it really looks like I will need a new motherboard, same make and model, but will be leaving everything else the same. Do you think Microsoft will reactivate it afterwards?

If not, I have backup images of my Windows 10, and was wondering if I could do a restore of my old system and purchase a new product code that would activate my already set up system?