Can't access admin account

SOURCE: Admin account on Vista pc locked out, forgot admin password

Step 1
START THE COMPUTER. DO THIS BY PRESSING THE POWER BUTTON. DO NOT WAIT UNTIL WINDOW LOADS TO PERFORM STEP 2.
Step 2
PRESS F8 KEY ***BEFORE*** WINDOWS VISTA BEGINS START UP. THIS WILL PROVIDE A LIST OF OPTIONS FOR HOW TO PROCEED.
Step 3
CHOOSE TO START YOUR COMPUTER IN "SAFE MODE".
Step 4
OPEN THE START MENU.
Step 5
OPEN THE CONTROL PANEL (from within the Start Menu).
Step 6
SELECT "USER ACCOUNTS AND FAMILY SAFETY" IN THE CONTROL PANEL POP-UP WINDOW.
Step 7
CLICK THE "CHANGE YOUR WINDOWS PASSWORD" LINK BENEATH THE "USER ACCOUNTS" SECTION.
Step 8
CLICK "REMOVE PASSWORD". VERIFY AND SUBMIT.
Step 9
RESTART YOUR COMPUTER NORMALLY. DO NOT PRESS F8.
Step 10
TO RESET A PASSWORD, ACCESS THE "USER ACCOUNTS AND FAMILY SAFETY" MENU AGAIN. THIS TIME CLICK "CHANGE YOUR WINDOWS PASSWORD", PROVIDE THE DESIRED PASSWORD, VERIFY AND SUBMIT. THIS TIME, WRITE YOUR PASSWORD DOWN.

If this helps please rate me. thanks

SOURCE: locked out of windows admin account and guest

Download the active Change Password and keep this in pen drive and boot from pen drive.
Do this and do comment for next process.