Solved: Windows 10 Activation Error 0x8007251D

At times, we start receiving activation-related issues after we perform an OS upgrade or replace the hardware. In this post, we are going to discuss one such error – 0x8007251D, the probable causes along with a few working fixes. Windows 10 starts popping this bug when the system doesn’t find any records for the DNS query. 

Well, this issue generates in two cases – change in Windows 10 editions i.e. Home to Pro, Enterprise to Education, etc. or you are not using a genuine product key. To get rid of this trouble, try a few codes on the command prompt to re-register the product key. In case you don’t have the product key, however, you were on an activated Windows earlier, use your Microsoft account to sign-in to your device. Microsoft will take care of the rest. Let’s explore the solutions in detail –

How to Fix Activation Error 0x8007251D in Windows 10

To solve the activation error 0x8007251D in Windows 10, try the following suggestions –

1] Through Command prompt

Since you are here, you must have updated Windows 10 build OS to the latest major release and start receiving this error code. Well, there is nothing to worry about as you can fix this executing two codes on the Windows Console. Here’s how to proceed –

  • Hit “Winkey and R” using the keyboard to start the Run dialog.
  • Type cmd near the blinking cursor and jointly press “Ctrl+Shift+Enter” keys.
  • When the UAC window comes into view, hit Yes to move further.
  • On the elevated prompt, copy/paste the below code followed by the Enter key.
slmgr.vbs –ipk <Windows product key>

Note: In the above command-line replace <Windows product key> with the genuine 25-digit character.

  • Next, copy/paste the below code and hit Enter
slmgr.vbs -ato
  • Wait for a while and you will receive a message that reads “Windows 10 successfully activated“.
  • Now, go back to the activation tab inside Settings UI and check whether Windows 10 is activated or not.
  • Alternatively, you may also check this under the System properties window –

That’s it. If you are still struggling with the error 0x8007251D, let us know with the exact error message in the below comment section.  

2] Run activation Troubleshooter

The activation troubleshooter is another great tool by Microsoft that works to solve activation issues in Windows 10. All you need is to follow the below guideline –

Note: To use this method, you need to first sign-in to your computer with full administrative rights. In case, you don’t have any, manually create a local user or administrator account on your PC.

  • Press the Windows key, and select the Settings (gear) icon.
  • Select Update & Security thereafter Activation option on the left pane.
  • Jump to the adjacent right and hit the Troubleshoot button.

Activation Issue

  • Doing so will automatically detect and repair the faults that prohibit Windows 10 activation. 

Imp:  The Troubleshoot option comes into display only if you are on Windows 10 1607 or higher versions. 

3] Use Digital License or Product Key

If you are still receiving the “Windows not activated” message on the Desktop, try using the genuine product key or digital license linked to your Microsoft account.

Use Genuine Product Key

  • Reach out to the below path –

Settings UI (WinKey+I) > Update & Security > Activation 

  • Jump to the right side and click “Change Product Key”.


  • Fill in the 25-digit product key on the upcoming window and hit Next.

0x8007251D - Change Product Key

  • Windows will look for its Genuity and if none found, this will activate your PC.

Via Digital License

At times, we forget or don’t have the access to the Windows Product keys. Additionally, there are users who have never bought any such keys, rather they keep on upgrading their PCs right from the Windows 10 launch. If you are one such user and have used a personal Microsoft account on the PC, you may activate your PC easily. 

Note: To use the “Digital license”, you must remain on the same Windows 10 edition. For example – Windows 10 Home users may use the digital license to activate the Home edition only. This applies to Pro/Enterprise/Education and other Windows editions as well. 

Here’s how to proceed –

  • Download/Install the same edition using a bootable installation media. 

Note: If you are already in the same edition, just sign-out of the current user account.  

  • When window prompts to sign-in, use the digital license linked Microsoft account to log into the device.
  • Restart your PC and from the next login, you won’t receive the activation error 0x8007251D.

Source – Microsoft Support