Please know I have exhaustedly rwmoved all sharing and all remote access to my devices--repeatedly. Everytime I sign off then sign back in..all my sertings have been changed..This person was so bold to fight me for my screen and he continually kept checking the box That I kept unchecking...until Im no longer even given the option to change the setting because its either grayed out or says I do not have permission to access...After I followed everyones advice here...my plan was to definetly get rid of wireless---on top of setting a regular audit and security plan fir all devices---now everything is on hold for the moment because this person has crashed my laptop...one of my daughters phones...and it looks like my Iphone is next on that list. Will update everyone after I bring my devices to Apple tomorrow. Again thank you so much.