If you see the error code 0xC004C003, the license has usually not been correctly registered in the system or the activation has failed.
Below we explain how you can resolve the issue:
Step 1
Open the Command Prompt (CMD) as an administrator.
To do this, type "cmd" in the Windows search and select "Run as administrator".
Step 2
Re-enter the purchased product key into the system.
To do this, enter the following command:
slmgr.vbs -ipk (Your Product Key)
If the process was successful, the message will appear:
"The product key has been successfully installed."
Step 3
Then perform the online activation or alternatively the telephone activation.
You can find the corresponding instructions in our support area.