https://www.pcgamer.com/pubgs-latest-anti-cheat-update-causing-crashes-and-wild-fps-fluctuations-for-some-players/

It's been a good few days for PlayerUnknown's Battlegrounds, all told. It showed off its next map alongside development plans for 2018, while Gabe Newell revealed that it was the third highest earning game ever on Steam. But it's been by far a perfect week. An anti-cheat update on Thursday began randomly banning innocent players, while the latest patch is creating an equal amount of chaos, causing random crashes and wild framerate fluctuations for some players. 

Most of the issues appear to be caused by a conflict between new anti-cheat measures and other programmes running on a player's PC, but there doesn't seem to be a reliable way to fix it. "We released a patch yesterday without going through any maintenance to add some new anti-cheat features. However, we know that some players are having compatibility issues, causing the game to crash or are unable to launch the game," developer Bluehole said on the game's forums.