UI lag then crash with high cpu usage

Hi,

At first game seems to work perfectly fine, but after couple of minutes UI gets laggy and then freeze entirely while games still works like nothing happened. I tried all solutions from "Missing, Invisible or Laggy UI" and none gave any results.

I noticed that CPU usage from the start of the game varies around 80% - which seems a little too much in my opinion but i don't know what else I can do.

Also i tried running the game with lowest settings (without any post-processing, etc.) and problem is not occurring, however my laptop should be able to handle at least high settings and I'd hate to ruin this beautiful game by playing like this :(

EDIT: I've also tried reinstalling game - with no effects.

My specs:

i5-6300HQ @ 2.30GHz

NVIDIA GeForce GTX 960M (with latest drivers)

8GB RAM