If you have one lone account and something happens you can't get in and fix it.
-> This is worse in Windows 8 given NTPASSWD may not work. PLEASE go set the password to blank if need be or go ahead and remove the user and accept you are willing to lose it all.
I've just installed a new HP laptop for my sister, who's upgraded from an old XP desktop. In doing the install, I have inadvertently created two user accounts (I'm new to Win 8), both with passwords. She doesn't want this, as it's a computer for all the family to use. How do I remove the accounts, or, at least remove the need to enter a password every time she boots up?