Win10 activation failed with error code 0xC004C003 Cause: Microsoft server is overwhelmed

I was unable to activate during the upgrade of WIn10 from WIN7. Many activation tools could not be activated, and some users failed to activate after the upgrade, and the error code 0xC004C003 was prompted. What is going on?

The official version of Win10 has been released for more than a week, and many users have upgraded their systems to Windows 10. However, the installation process of some users is not very smooth, and various software and hardware compatibility problems, application problems after installation, etc. will bring trouble to these users. In addition to these issues, there is a big problem with Win10 activation. Because this operating system was very popular at the beginning of the release, it surpassed any previous Microsoft operating system. As a result, the amount of installations in the short term is very large, and it is accompanied by the fact that the number of activation requests that Microsoft activates the server to handle is also very alarming. This situation has never been seen before.

Some users have reported that they can activate normally after upgrading Win7/Win8.1 to Win10. Then they decided to format and reinstall Win10, because the device that has successfully activated Win10 can always be activated again in the future without entering the product key. However, things were not as smooth as they thought. After reinstalling into the system, it was found that the activation failed with error code 0xC004C003. They then reported this to Microsoft and were told to wait 24 to 48 hours. After waiting for two days, their system still failed to activate.

After that, they contacted Microsoft customer service again and were told that the situation was caused by a software defect and would be fixed by Windows Update within 48 hours. Microsoft once explained the problem, saying that this was due to the fact that the number of Win10 activation requests was too large in the past few days, causing the server to be overwhelmed. Therefore, at present it seems that if you want to solve this problem, you can only wait patiently for the activation server to return to normal.

If you encounter Win10 activation failure, but do not want to wait, can refer to this article Win10 Pro activation failure error code 0xC004C003 how to do?