depending on the version you have:
1. right click on "Computer" icon or thought the start button, go to manage
then to Local Users and Groups. You can't delete the guest account or
built-in administrator account but you can disable them

To delete an account, right click on the account and delete..

Most of these tasks can also be performed from the control panel --> user
accounts

You can simply log on with your administrator account, go to Control
Panel/User Accounts and change or delete the password for that 'other'
account.

Pinging around;527574 Wrote:

Hi Pinging around,

This tutorial will show you how to either Remove or Change the password
for the other Administrator account from within the Administrator
account you did not forget the password from.

http://www.vistax64.com/tutorials/101986-user-account-remove-password.html

Shawn

    Why not simply use the administrative account to reset the "other"
account's password?