So yesterday my dad asked me to get one of his work computers to connect to his home network. I went into the system menu and changed it from domain to workgroup. it told me to restart to let the settings take effect. After restarting it came up with the log in screen that it has always done (where you need to hit crl,alt,delete). Now his login and password are not working. I am guessing that it is because it is not in the proper domain for it. I am not sure how to get around the login part or to just change the setting back. This computer was setupby his ofice and I think it has a admin password on it but he does not have it. He is going to try and get it on monday but I am not even sure if that will work.