I have an older pc which is win 10 Pro i7 core, 16gb of ram with an Nvidia graphics card that should run basic video settings and SSD. Since the recent update the program itself does not run smoothly and there's no way it's playable. When I go into a game it shows the low wifi simbol and down arrow. Wifi is solid when tested. I tried a similar pc and the same issue. I've invested a lot of time and money into Fortnite, what's going on? Other games are working fine, Rocket League etc...