Freezing problem

Hello guys.
I have a huge problem with freezing. So the problem is (screen) whn that window popsup all things starting to freeze, that was on launcher and ue4
who can i repair that?
Intel Core i7 6700K 4.0Ghz
Corsair Hydro H100i V2
MSI Z170A Gaming M7
HyperX Predator 2x8GB
Western Digital Caviar Black 1tb
Kingston 240GB
Corsair 750W Active PFC Modular 80+ Gold RM750x
Corsair Graphite 780T Black
Windows 10 home