How do I reset my password if I don't remember the original?

[rfh611]

When i first got my computer, I entered a user name and a password. The username comes up automatically but i can't remember the password. I just need to start over from the beginning but don't know how. Would removing the battery erase everything?

 

[rgd1101]

read http://www.tomsguide.com/forum/id-2317969/read-passwords-lock-codes-pin-numbers.html