Windows Update Rings

Suddenly stopped working after 50% of the devices got updated and the remaining 50% did not get updates for December 2024. 

Even a manual update error out

Finally, they are saying that the system certificate registry key could be corrupted and import that from a good computer and update it. I did that on one build of Windows 11 it works but for another build it does not work. 

This is the reg key they are talking about

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates

But I see that this key is in Wow64 location also. So, I am not sure whether I should update this on the device that it does not work. Has anyone run such issues with December 2024 Updates?