0x803fabba Windows Activation Error: How to Get Rid of It

What causes 0x803fabba Windows activation error?

0x803fabba There can be multiple reasons behind Windows activation error. Here are some potential factors that may trigger the error message:

• Major Hardware Changes – Because you made important changes to your hardware, Windows will treat your PC as a new one , therefore, it does not accept the same activation key.
• Windows Digital License Not Found - Windows may not be able to find a compatible license the next time you turn on the computer.
• Fake or Incorrect Product Key – Another possible cause of this error is that you entered an invalid or incorrect product key. You can follow the instructions provided in this guide on how to find a valid Windows 10/11 product key.
• Wrong Microsoft Account – Microsoft provides a special way to transfer Windows licenses after hardware changes, and you must be logged in to the same Microsoft account.
Incompatible Windows Version – This error may occur if the Windows 11 version you selected is different from the version you are entitled to.
• Now that you know some of the potential causes of the 0x803fabba Windows activation error code, you can explore the solutions provided in the next section to resolve this issue.

How to fix 0x803fabba Windows activation error?

Before performing any troubleshooting steps, please apply these quick tips:

Purchase a valid activation code.

Please check your internet connection and try again.
• Confirm your Windows version.
• After confirming the above checks, if you still need further assistance, please check the following.

1. Run Windows Activation Troubleshooter

Press the key to open

Settings

.
1. WindowsIThen, click System in the left pane, and then click Activate## in the right pane #".
2. If your version of Windows is not activated, you will see Troubleshooting on the right.
Click it and follow the on-screen prompts to fix activation issues.
3. 
4. Expert Tip:

Some PC problems are difficult to solve, especially when they involve corrupted repositories or missing Windows files. If you are having trouble fixing errors, your system may be partially corrupted. We recommend installing Restoro, a tool that will scan your machine and determine what the fault is. Click here to download and start repairing.

Whenever an activation error occurs, the first thing you should do is run the Windows Activation Troubleshooting Wizard to see if you can resolve the issue.

2. Link your Microsoft account to your digital license

Click the

Get Started

button and select "Settings."

1. Select "Account" from the left pane and click "Your Information" on the right.
2. Under your name you will see Administrators. Confirm that the administrator account is also your Microsoft account by checking to see if the email address
appears above
3. Admin.
4. If an email address is displayed, it is a Microsoft account. If not, you log in using a local account. (See here to create a new Microsoft account). Now return to the
"Activation
5. " page in "Settings".
6. Select "Add Account", Enter your Microsoft account and password, and then click "Sign In".
7. That's it! After you add your Microsoft account, the message on the Activation page will now read: Windows is activated with a digital license linked to your Microsoft account.

   3. Reactivate Windows 11 License

   1. Right-click the Start button and select Terminal (Administrator) from the list.
   2. Click "Yes" in the UAC (User Account Control) prompt that appears.
   3. Now, click on the down arrow and select Command Prompt to open it in a new tab. Alternatively, you can click the key combination. CtrlShift2
   4. Next, type or paste the following command and hit: Enter<strong>slmgr.vbs –rearm</strong>
   5. Alternatively, if the process fails, you can use the following command and replace X with the actual license key: <strong>slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx</strong>

   This command will force a reinstallation of the Windows 11 license, if it is the correct license, You will receive confirmation.

   If after trying the steps above, nothing can fix the error, the next best call is to contact Microsoft Support to help you reactivate your Windows PC.

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