THIS TRICK IS OLD BUT IT STILL WORKS
IN THIS TRICK YOU CAN CHANGE ANY USERS PASSWORD

1ST OPEN RUN(CTRL+R)
THE N TYPE “NET USER”

NOW HIT ENTER YOU CAN SEE THE NAME OF ALL USERS ASSOCIATED TO THE PC

THEN TO CHANGE THE PASSWORD TYPE
NET USER USER NAME *
EX- NET USER ADMINISTRATOR *

HIT ENTER THEN IT  WILL ASK YOU FOR PASSWORD.IT WON’T SHOW YOU THE PASS WORD.
IT RUN INSIDE .
THEN HIT ENTER AND DONE.
HOPE IT WILL WORK FOR YOU.