hi i have an es15 a day old, password not valid even though i used it at least 3 times after set up

hi ya i have a es15 a day old ...after a basic set up i set the password as the old laptop to make it simple , i logged in and out at least 3 times went to log in again and the password is not valid ?????? same hint showing on screan , and asking for a key usb to reset it , looked online but don,t want to be screwed for money and a virus and am not the most techy person ? please advise as 24 hours after buying laptop i want to axe it