Some agents wont install with "Access Denied" error.

Some agents wont install with "Access Denied" error.

Hello.
I have 80 Windows 10 machines all in the same domain. When remotely installing the Patch management engine 8 systems give "Access Denied" errors.  I have tried the Domain administrator account and my administrator account.  I can access the C$ share with no problem  In control panel i can remote mange these machines no problem so i know its not a permission error.

What else can it be?   Installing the agent manually is a problem for these people who work long hours.