change to domain

[dhaneshmchandran]

I can't convert the network from workgroup to domain. The icon of domain is showed as disabled

 

[Alabalcho]

You need a domain controller (generally, Windows Server with AD role installed and configured) in order to have a domain.
Also, Home versions of Windows cannot join a domain.

But I would rather ask you another question: Why you think you need to place your Windows computers into a domain?