hiya guys just joined the site. I lent my laptop to a “friend” who has now added a user accout to my laptop. i didnt think this was a big deal, but now i have realsied he has made himself administrator. i have tried reading up on how to remove this but i am struggling, im rather hopeless when it comes down to computers so require a very dumbed down help guide to remove his user account and password from my laptop! any help much appreciated.