The Uncharted 4 AVX2 error typically occurs when the game's executable tries to access AVX2 instructions that are not supported by the player's CPU. This can happen for several reasons:
When the community erupted, developer Iron Galaxy stated that the AVX2 requirement was for the official build. They cited that recompiling the game without AVX2 would require: uncharted 4 avx2 fix
: The game now detects your CPU at startup. If it lacks AVX2, the title automatically switches to a fallback executable: u4-l.exe for Uncharted 4 or tll-l.exe for The Lost Legacy . The Uncharted 4 AVX2 error typically occurs when