Answer:
You can change administrator's password by a few easy steps.
1. Open the Start menu and click on "Run..."
2. Type "cmd" and click enter.
3. Type "net user (admin name) *
Where it says (admin name) you should type the administrator's name. Make sure you type a space and then a *.
4. It should ask you to type a password. Just type enter if you want no password.
It should then ask you to confirm. Re-type what you just typed.
5. There you are. Log out of your account, and their password should be changed/gone. Now go onto their account, go to "User Accounts" and make yourself an administrator.
6. GET SUSPENDED