PC's not in Domain

[AlainTech]

Hello,
My native language is french so be indulgent with my explanations.
I installed avast! Business Protection on a Server.
There are 7 PC's on the network but these PC's are not in Domain.
The server is only File server + DHCP.
How can I install Avast on the 7 PC's and let them manage by the server?

Thank you for your help