I'd replace that 'owner 1' with a username you know the password of. If you don't know any password, the first thing to try is the secret administrator account that appears if you boot into Safe Mode. By default it doesn't have a password, so you can login and make your own accounts.

If that doesn't work download NTPASSWD from http://pogostick.net/~pnh/ntpasswd/ and use that clear the password so you can logon and start customizing the machine so it fits your purposes.