Admin Account Setup

I am having problems setting up the admin account on a Windows Server 2008/ Server Settings: Embedded Database. The Admin Account gives me an error: There was an unexpected error encountered when setting the new admin information at the last step of the setup. I skip the step and try to logon using the default and it doesn’t work. I try logging out and back in and it takes me back to the start of the setup again. Can anyone give me any help with this?