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.
Got a used comp from a business. When I start up the comp I get a 'log on to windows screen that auto puts 'Owner 1' in User name field. I have no idea what password to use.
How do I remove all this so I can get to the desktop?