Changed to Domain from Work group and now I can't get in

[ashcpn]

My original computer won't boot up so our uncle gave us an old work computer with a user name and password. I was trying to download iTunes on to it last night but it said I couldn't because of the network. So I Googled what to do and found an answer of changing from Workgroup to Domain. The computer then told me to restart so I did. Now the username and password won't work, and neither with Administrator with a blank password. What can I do?

 

[Petrossa]

I presume you know the name of a local system account, since the account you were using is a domain account.
If you are sure that administrator is a local account, put the user name in this format: pcname\administrator

 

[ashcpn]

Petrossa, it was in workgroup and changed to Domain, so I want in domain when I changed it. I know the username that worked, but I don't know the pcname. Or were you saying just to write pcname?

 

[ex_bubblehead]

You don't have to know the computer name in order to log in locally. Just use ".\<username>" (without the quotes) in the username field.

".\" is the shortcut for a local login.

 

[Petrossa]

Thanks for that.
Now I've learned something.