As we all know that PUBG uses to allow ReShade But in a recent patch. PUBG has officially banned the usage of Reshade in PUBG. As per PUBG's new guidelines usage of ReShade will be considered cheating and the player will be banned instantly. But don't worry you can still use NVIDIA Freestyle or Vibrance GUI.
You don't have to worry if you are not using Reshade. If you are using Reshade simply follow the steps mention below to uninstall ReShade from PUBG. If you are a laptop user and want better graphics and clarity in PUBG, then you can use an external graphics card too.
As per the update of PUBG, I have made some new methods to get the same effect as ReShade. And there is no risk of getting your PUBG ban. So, check out my article about How to Use Nvidia’s Digital Vibrance with PUBG. If you still want to use ReShade even with the ban. Check the article about how to install Reshade in PUBG.