Can't authenticate/ need user password reset

hey so i just installed Zorin 6.1 and am enjoying it, but ive run in to a bit of a problem..
i set up accounts for my wife and i and selected "no password to login" for both of us..
but no i cant authenticate anything. although my keyring pswd still works.
when i try to auth with my old pswd i get 'your authentication attempt was unsuccessful. please try again'
is there anyway to reset my user pswd w/o re installing.

ive already googled my face off and browsed the forums to no avail.

haha yah i was just being lazy. reinstall it is.. good thing i havent got to far into it. thanks for the help, password protected from now on.

https://help.ubuntu.com/community/LostPassword

http://askubuntu.com/questions/24006/ho ... 4024#24024

http://manpages.ubuntu.com/manpages/luc ... swd.1.html

http://www.noobslab.com/2012/02/reset-y ... ickly.html

The first user after install is always admin, user the Users and Groups function for user management:

sudo apt-get install gnome-system-tools

and look for Users and Groups in the main menu.

Regards Wolfman