well like the have made admin accounts and put a password to it so for me to access the windows vista system i need a admin account which i don t have i only have a guest account so i was thinking is their anyway to reset the password for the admin accounts via a guest account
There are only 2 ways to get round this problem as far as I am aware:
A clean install of Vista (Not practical) or
Offline NT Password & Registry Editor.
I would not recommend this option to you unless you are completely stuck and need to get back into your PC fast.

Warning
This software is for personal use only on devices that you own and should never, ever , ever be abused to steal, hack or otherwise harm someone else's computer even as a joke. Doing so could be a major criminal offence. You have been warned.
This specialist Linux distro allows you to boot into it and remove Administrator passwords you have forgotten.

Warning
Making a mistake on this software can be VERY costly and you amy lose or seriously damage files or hardware in your computer to the point where it won't turn on.
To use this technique you must download the software and burn it to a disc.
Once burnt to a disc boot into it.
From here follow the instructions at
Offline NT pw & reg-editor, walkthrough .
You can download the software from the bottom of
Offline NT Password & Registry Editor .

Warning
Please exercise common sense while using this software.
I wish you luck with which ever option you decide to take and if you have any questions please don't hesitate to ask.
Oli