YouTube: Change a Windows XP password using the command prompt without entering the old password
Bravo Microsoft! The video embeded below shows how to change the password of the current user account that you are logged in under without entering the previous password. This kind of thing should not work. I will have to test to see if Vista is susceptible to this “hack”.
The operating system should always ask you for the old password before allowing you to change it. Hopefully this only works when logged in to an administrator account. In Unix the superuser can change other user’s passwords without knowledge of the old password. If logged in as any other account you can change only your own password after typing in your old password.
Here’s what to do:
net user shows you who you are logged in as
net user <account> * allows you to change the password
Video: