Win10 activation failure prompt 0xC004C003 how to do

In order to experience the latest version of win10 system, most users will choose to upgrade the system in the first time. However, some users recently upgraded the system from Win10 10166 to win10 10240, but found that the system is not activated, and error 0xC004C003, prompting that the specified product key has been blocked, what should I do?

Currently The preview version of the activation code has expired and the preview version cannot be activated. Win10 10240 should be the RTM version. You can skip the process of entering the key directly during installation to see if the system is already active after the installation is complete.
In addition, here is an activation method, the KMS activation method seems to only remain active for 180 days.
WIN+X Press A to copy the carriage line below
slmgr.vbs /upk
slmgr /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX
slmgr /skms zh.us.to
slmgr /ato
Users using the membership program can receive a version of the affiliate program that is subsequently pushed. If you are in the official version, you may be able to give priority to members of the member program.
In addition: Win10 will be officially released on the 29th of this month, has stopped receiving the preview activation request and does not allow new computers to join the Windows Preview Experience Program. The installed preview version also (temporarily) will not receive the new preview version. Upgrade notification.
When the Windows 10 is officially released on the 29th of this month, the official version of Windows 10 will be pushed, and members who are willing to continue to participate in the Windows membership program will be given a new preview.