YBMB

So im suffering major FPS issues on my computer which can easily handle games such as Forza Horizon 4 on Ultra graphics without any lag or FPS issues whatsoever. Quick Specs : 8gb VGA & 12gb RAM Windows 10. When I play FSX I immediately experience FPS averaging 8-15 throughout the game, I used to play FSX on my MacBook Pro thru bootcamp and it only had 1gb video card and I rarely had any issues averaging 30fps. Im not sure if using Windows 10 is the culprit as I've just recently bought this computer as well as using windows 10 for the first time. (my MacBook had windows 7 previously) any help would be greatly appreciated. Thanks.