here I can not help 
… but MSFS is in point of “view” another world than FSX.
We have users which use MSFS also not with the Highest-End-System in the world and may be you can get some hints to get it running on your system: ( Example our Arcane : Never CTD 1.5 years, but in last month 80% of times - #19 by ArcanePython931 ). But I think also these laptops are much newer than yours ( gpu, also cpu which is in your case 6th gen. i7 , etc. ) and not sure whether you can much enjoy the game, also in case it would works.