Wildly lag after the update (Fortnite)

The game flew on the ultra and stably without a problem gave 60 FPS (is limiting because I don't need) it works fine in combat is IMHO sometimes just show 1 frame and for the whole battle and all the sounds were all the drivers updated kas cleaned for viruses checked all the rest of the game remained playable, and they all had a great fortnight deleted and downloaded and what I just did but the problem is the window remained the same (the AMD i 3 and video carat ge force gtx 1050 ti RAM 8 gigov ) if anyone can help here is my deep AsidSikeO#2747 thanks in advance PS I'm 13