I notice you're asking about an "AVX2 fix" for Uncharted 4 on PC.

Why Does Uncharted 4 Require AVX2?

The Uncharted 4 game engine utilizes AVX2 instructions to optimize performance on compatible processors. This allows for smoother gameplay, more detailed graphics, and a more immersive gaming experience. However, if your processor does not support AVX2, the game will not run, leading to frustration for those trying to play it on older hardware.

  1. Download the Uncharted 4 AVX2 patch file from a reputable source.
  2. Extract the patch file to the game's installation directory (e.g., C:\Program Files (x86)\Steam\steamapps\common\Uncharted 4).
  3. Run the game as administrator.

Update the Game: Ensure you are running version 1.3.20812 or higher.

The saga of this fix underscores a recurring theme in modern PC gaming: the tension between optimization and accessibility. From a developer's perspective, targeting AVX2 allows for cleaner, more efficient code on the majority of target hardware. Supporting older instruction sets requires maintaining legacy code paths and testing on antiquated hardware—a resource drain for studios working on tight schedules. Yet, the PC platform is defined by its heterogeneity. Unlike consoles, where hardware is standardized, the PC market is a fragmented landscape of varying architectures and ages. By neglecting pre-AVX2 support, the developers ignored a core tenet of PC development: backward compatibility.

How to get it: Update the game via Steam or Epic Games Store. If the game doesn't update automatically, you can verify game files on Steam to trigger the download. Alternative Workarounds

Right-click on your Desktop -> New -> Text Document.