Hi @Sandu Daniel ,
Welcome to our forum!
As I know, If you see error code 0xC004C060 when you try to activate Office, your product key is no longer valid. Please refer to this information about error code that you are receiving: Error code 0xC004C060 when activating Office.
Hope the above help!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.