I've just finished building a domain controller to change our network from a WORKGROUP to a more manageable and secure domain.
I've only created a few user accounts and (domain) security groups at the moment and I'm adding computers (that are rarely used) so I can do configuration and testing.
I'm adding them by right-clicking My Computer > Properties > Computer Name > Change... > clicking Domain (in Member of...) and typing in the domain.
I then use the user account that I created and click OK. Restart the computer, log in and everything looks OK.
I need to access data from the old local user account and cannot do this because the new domain user account is "standard" or "power user" or something. Can I make it so it is part of the Local Administrators?