Change Admin passowrd.

 1. Download the ISO image from here and burn a CD with this ISO image file.
 2. Boot your computer using this bootable CD created in step 1. You may need to set your CD-ROM as first boot device in BIOS in order to boot from it.
 3. Once you boot your computer with this CD, you will get a command based interface which is quite self-explanatory. On first screen, press enter key to boot in     default mode.
 4. After you boot, it gives option, it will show the drive partitions and will give the choice, “Please select the partition number.” Press enter if windows is     installed on C drive, else select the appropriate partition.
 5. Now it will ask ” What is path of Windows directory ?”, press enter for default value.
 6. Now it will show option “Select which part of registry to load” . Type 1 and press enter.
 7. This will show the list of users on the windows. Type the username of the user for which you want to gain administrative privileges (rights).
 8. Now it will show following choices

    1. Clear the password
    2. Edit password
    3. Promote user
    4. Unlock account
    5. Quit

    Type 3 and press enter.
 9. After you press enter, it will show a warning. Type y and press enter to continue.
10. Now type ! and press enter to come to previous menu, here type q to quit and press enter.
11. It will now say, About to write files, at this type y and press enter.
12. It will ask to Run again. Now take the CD out of the tray and restart your computer.

    Its Done! This user will have administrator rights next time you restart your windows PC.