Verified answer

Yah, as noted above, start your computer in Safe Mode. You can do this by tapping the F8 button when you first turn on your computer. Then just select Safe Mode from the list. Then when the computer loads up, the Administrator account should appear on the Welcome Screen. Click it,a nd you should be able to log in without a password. Then go to Control Panel and just change the Administrator password there. Good luck. Oh, and I would suggest punching your little brother in the stomach so he knows to never do anything like that again. =)

Go into Safe Mode and log into the Administrators account. It doesn't have a password.

go to start-->

control panel-->

user accounts-->

then just clcik on the account you want to change and edit the settings. the password change setting is the 2nd on the list of toptions once you click onto your account. you can even limit other peoples accounts if you go to "change my account type"