yesterday i deleted what i think was the administrator account for my pc because my ex-boyfriend set everything up and his name was coming up everywhere before files and i thought i was just removing his name. today when i put on my pc i have lost everything

files, photos, settings there is nothing left the pc has started as if it is brand new. how do i get it back to the old settings and save all my files and settings?? please help...
also my pc wont do system restore as i tried several times on different dates and it says the computer cannot be restored, i have tried putting disk space that system restore uses to maximum and it still wont work
