Using System Center Administrator and particular domain user to push virus definition and security patches. How can I do that?
There are a few steps you have to take in order to deploy security updates and patches to the computers in your administrator. For that particular job, I recommend checking the official guide provided by the Microsoft. On the Technet page, you will see 3 big steps with different instructions that teach you how to deploy the packages.
Technet page: https://technet.microsoft.com/en-us/library/hh508770.aspx