Icons missing and setting changed

Hello,



I really need help, yesterday my desktop was normal, the next morning after breafast i turn on the computer, type in my password and this box appear, its said something about saved profile. i clicked ok 3 times before it disappear. it took like forever for my homepage to go on, but it wasnt exactly mu homepage. i think i got hacked or whatnot, because most of my icons are missing my music playlist, its songs are all missing, even the playlist is missing, all my downloads are gone. i went into all program managed to restore a bit of my icons, i went on facebook on google chrome but when i typed the first letter of my email, my whole email didnt appear. its like all my saved imformations is gone... also my wallpaper is changed form an island into a meadow, i never did it. can someone please help me !!!!!!!!!!!