Windows 11 not activated after upgrade? Here are 7 fixes

If you have recently converted to Windows 11, your Windows 11 may not have activated after the upgrade.

Error code 0xc004c003 is an issue users encounter when their system attempts to activate the operating system using an OEM activation digital product key.

Although this may seem like a serious problem, you should be able to fix it using one of our solutions.

What is the 0xC004C003 activation error code?

#This error occurs on Windows 11 when trying to activate a Windows license when the operating system encounters an error on the server. The reasons cannot be listed individually.

The error will appear in the following format:

We cannot activate Windows on this device because you do not have a valid digital license or product key. If you believe you do have a valid license or key, select Troubleshoot below. Error code: 0xC004C003

What causes 0xC004C003 Windows 11 activation error?

To access the registry hive and verify the product key, you must go through the Licensing Code component in Windows. The 0xc004c003 error code is triggered when access is denied due to the wrong access being used.

It's also worth noting that unsuccessful key verification can cause this error. However, the reasons for unsuccessful key verification vary.

What should I do if Windows 11 is not activated after upgrading?

1. Activate Windows 11 using Command Prompt

1. key and type cmd on the search barWindows.
2. Then, right-click Command Prompt and select Run as administrator. If prompted by User Account Control , click Yes.
3. Type the following command and press Enter: <strong>vbs –rearm</strong>
4. After the request is successful , click OK and restart your device.
5. Open the activation page and check if the error has been resolved.

Sometimes, due to server issues, Microsoft servers are unable to verify and activate your license. However, you can still use the command prompt to activate your license.

2. Use a PC Optimization Utility

We cannot activate Windows on this device 0xc004f074 message is usually caused by an underlying problem with the system files or registry. Utilities like Restoro can safely fix these problems in minutes.

It replaces any damaged or missing files on your computer using a secure database containing all the latest Windows system files.

This application can repair and optimize your registry, fix DLL files, remove error messages and identify stability issues in your PC.

To fix this error with Restoro, simply open the application, start scanning your PC, and let the utility automatically fix any issues it detects.

In addition to system-specific errors, Restoro is able to evaluate your hardware and provide you with information about CPU temperatures, out-of-memory issues, and more.

⇒Get Recovery

3. Check which version of Windows you are using

Notes The operating system installed may change depending on what you have installed on your device Windows 11 way. Especially if you performed an in-place upgrade, Windows will automatically detect the existing version and install the appropriate version that you should be using.

1. Press the Windows I key to open Settings.
2. Click System, scroll down, and click About.
3. Then, scroll down to the Windows Specifications section. Find the Versions section to see the Windows 11 version installed on your PC. If your Windows 11 matches the previous version you installed, this is not an issue causing the error code.

4. Ask Microsoft to reactivate Windows

When you first register a Windows 11 license, it automatically associates itself with the hardware on the device. This helps Microsoft ensure that the license is used according to the terms indicated.

Expert Tip: Some PC problems are difficult to solve, especially if the repository is corrupted or Windows files are missing. If you are having trouble fixing errors, your system may be partially corrupted. We recommend installing Restoro, a tool that can scan your machine and determine where the fault lies.
Click here to download and start repairing.

Thus, users do not need to manually activate Windows on their operating system every time they do a fresh installation.

However, if you make hardware changes to your device (for example, you get a new motherboard), Microsoft won't be able to verify its validity. Therefore, the 0xc004c003 error code occurs.

To resolve this issue, you can use a digital product key or even run a troubleshooter to verify and activate Windows.

Use resources from Microsoft, especially if Windows 11 was not activated after a fresh installation or hardware change.

5. Switch to Windows 11 Home Edition

If you upgraded your device from Windows 11 Home Edition to Windows Pro using a Home Edition license key, this is why the activation error code appears.

So you can downgrade to a previously installed version or upgrade to the Pro version by purchasing.

6. Adjust the registry to install Windows 10 Home

1. Press the Windows R key to open the run dialog box.
2. Type the following code and click OK. Additionally, click yes when prompted by User Account Control: <strong>regedit</strong>
3. Browse for the following code in Registry Editor: <strong>Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion</strong>
##On the right, find and double-click
4. ProductName value.
Then, enter
5. Windows 11 Home Single Language. Then, click OK to save changes.
Then, find and double-click
6. EditionID Value.
Then, type
7. CoreSingleLanguage and click OK to save the changes.
Next, navigate to the following location in the Registry Editor:
8. Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion<strong></strong>
In the right pane, find the
9. ProductName value and change it to Windows 10 Home. Then, click OK to save changes.
Then, find
10. EditionID, double-click it, and change it to CoreSingleLanguage. Click OK to save changes.
Close
11. Registry Editor.

This is an advanced solution, but as long as you follow the instructions closely, it should help you if your Windows 11 doesn't activate after upgrading.

7. Switch to Windows 11 Home Edition

1. Go to Microsoft’s official homepage Windows 11 to get the web page.
2. Scroll down to the DownloadHome Windows 11 Disk Image (ISO) section. Click the drop-down menu and select Home Windows 11. Click the Download button.
3. Then, select the language you want to use. Click Next.
4. Click the 64 bit Get button. This will start the process of obtaining the Windows 11 ISO.
5. After downloading the ISO, open the folder. Then, click on the ISO image and select Mount.
6. Home Windows will automatically mount the ISO and open the drive folder. If not, click the DVD drive icon under This PC. Then, double-click the Setup.exe file in the ISO folder. Then, click Yes if prompted by User Account Control.
7. Then, click Change how the installer downloads updates.
8. Clickis now incorrect. Then, click "Follow" to continue.
9. Select Notification and permission phrase.
10. In the Ready to drop window, make sure the Set up Home Windows 11 Home and Maintain private records data and apps options are displayed. Click Install and wait.
11. Then, restart your device.
12. Navigate to the Settings page. Then, select About. Find Home Windows Specs and test the version.
13. Activate Windows by opening the Settings page. Then go to the Activation section located under System.
14. Follow the on-screen instructions to activate your version of Windows 11.

This is how you can reinstall your home Windows operating system without losing important files or applications.

The activation error does not exist on devices currently running the January 2021 security build or earlier.

If you are currently experiencing activation issues, please run the January 12, 2021 version or earlier to resolve the issue.

How to resolve activation error codes on Windows 11?

Microsoft does not allow users with unactivated Windows licenses to use certain personalization and other features on the system. Therefore, you need to verify your Windows 11 version and product key.

Alternatively, you can use the command prompt. What's more, verify the validity of your license and downgrade to the correct Windows 11 version if necessary. You can check out our tutorial on how to reset Windows 11 to its factory settings.

Also, even if Windows 11 is not activated after the upgrade, feel free to use third-party repair apps that will help you deal with various Windows update difficulties.

However, if the same issue persists, you should consider rolling back from Windows 11 as we are waiting for Microsoft to come up with solutions for these bugs and glitches.

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