hack admin password using command prompt

-run as administrator

-run following command in cmd

1.net user (find username of system)

2.net user --username--

3.net user --username-- * (for delete of current password)

4.net user --username--  --newpwd-- (set a new password)

note:
    -only learning purpose
    -u can not find user type : echo %username%
    -or search windows : netplwiz