Typically when you set up a domain on your network and domain users, you might want to give them local admin access to do things like install programs on that PC without making them an administrative member of the domain.
1. Right-Click Computer> Manage
2. Expand System Tools> Local Users & Groups> Groups
3. Right-Click Administrators and choose Properties
4. Go to Add… and then add the users you want to have local admin privileges to install software and make LOCAL changes. In my case, I add Domain Users.