Actually, now that I think about it. How old are you really? Its near impossible to accidentally install a parental lock. Even if you install a software firewall or a router with one built in, it is turned off by default in pretty much all cases. If you installed one and set a password, you would know about it. If your parents installed one, we shouldnt be helping you crack it... and as I check your profile I notice you were carefull to omit your birth year.
I'm sorry this is all too shady for me. I'm gonna have to close this thread, but its unlikely that you would have gotten a decent answer anyway. Its too hard to know where the lock is located without being at the keyboard to find it.