How to Bypass Windows 7 Password?

We know there r several ways to Bypass Windows 7 password. But all of this either need any software or Windows CD.Can you please tell me how to Bypass Windows 7 password without any CD or Software?I mean when Windows boot up if we press shift 5 times the cmd line come up, can we bypass the password or reset the password from that cmd line without any CD or any software? Just trying some kind of commands....