Windows server 2016 reinstallation license issue

Hi there,

Did you make any hardware change ?

This issue might occur when you try to activate the operating system with an OEM Activation 3.0 (OA3) Digital Product Key (DPK).

Error 0xC004C003 occurs when a licensing code component tries to access a registry hive without proper access. A resulting access denied error causes the product key not to be extracted correctly.

KB5001692: Windows Activation fails with error 0xc004c003 on devices which have installed the Windows 10 January 2021 nonsecurity preview release or a later version

https://www.dell.com/support/kbdoc/en-ie/000194108/windows-activation-fails-with-error-0xc004c003-on-computers-which-have-installed-a-non-security-preview-release-of-the-windows-10-20h1-or-later

I hope this information helps. If you have any questions please let me know and I will be glad to help you out.

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Make sure it is patched fully.
https://support.microsoft.com/en-us/topic/kb5001692-windows-activation-fails-with-error-0xc004c003-on-devices-which-have-installed-the-windows-10-january-2021-nonsecurity-preview-release-or-a-later-version-e9bdc0df-e8bc-4b77-9130-2958cd44b058

Also might try phone activation
slui 4

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