How do i change user name without admin. ?

I cant make a new user account without %26quot;the%26quot; administrator so i want to edit the user account and i'm having trouble with changing the account name so does anyone know how??? (without admin.)How do i change user name without admin. ?
Goto Run and type compmgmt.msc.. u will get a new window.. i that select local users and groups--%26gt;users--%26gt; and then right click on the required user account and then set password...How do i change user name without admin. ?
you have to find the defauld code for the brand and model,

my pc default is a lot of zero and did you try pc user?

maybe that will do it.