This hack works if you are at someone else's home and you are logged into the account of the person whose account you want to hack.
This also works if you want to hack someone else's account on your pc bit do not know his/her password.
Click on START-->RUN.
Type compmgmt.msc & press enter.
In the left pane, select COMPUTER MANAGEMENT--> SYSTEM TOOLS--> LOCAL USERS AND GROUPS--> USERS.
Then in the right pane, select the user name whose account you want to hack.
RIGHT CLICK and then click on SET PASSWORD from the pop-up menu.
Enter the new password.
Click on OK.
There you have it.
You have changed the user's password!