Windows 10 update with League of Legend fps issue

So after I did this windows 10 update which was a bigger one than usual to add a feature, I have been having 40 fps. Even when I have it uncapped, it generally would get either 60 which is usually only 10% of the game, and the rest of it I get 40 fps. This is really frustrating since it feels like I have a handicap. The 60 fps was in issue from before and I don't have a problem playing with that fps as the maximum. I have a high-end comp (alienware) so the fps shouldn't be an issue. I was fine with playing on 60 fps even when uncapped before, but 40 fps makes the game a little glitchy and definitely not smooth.