Don't delete Ubuntu,it's not his fault it's yours.To change your passwd do this;
boot into recovery mode from GRUB menu and at the prompt, change the password for that user, john (assuming john is the username...)!
or when grub starts up, you can press "e" to enter edit mode, and edit one of the lines by adding the word "single" onto the end. Then press "b" to boot into linux single mode, which will give you root privileges. From there just type
to change your password.
Last edited by alan_ri; 03-03-2008 at 08:52 AM.