You can login as any user other than "Owner", such as "administrator" (built-in Windows account). Once you do that, go to Start -> Run -> type in "control userpasswords2"
When the dialog box comes up, select the user name you want to modify, in your case "Owner". Once you do that, select Properties. The primary box will say user name with your username in a text box. Change from Owner to whatever you desire. Login with new name, all set.
ok i have logge din under admin when i di dthe first step you gave me. the when i logged into my account thats says Danny, i got an error saying NSW 2005 cant performe due to lack of admin rights. i went to users and it sayd im a guest.