my fallout 4 game will not save,

i checked the c:user/name/documents/my games/fallout4 .

and there is no save game there, its anoying that i have to keep starting every time,

my pc is a windows 10, i5 quad 4/ 3.6 mghz, 16gig ram

on a navidia 650 gtx 2gig ram grathics card

its a zoomstorm gaming computer...............

help and advice will be appreciated, and all though it only plays in a tv screen size , and will only go to midieum settings,

I will update my pc to i7, and a better grathics ccard when the save game problem is sorted