For reference, official v1.0.37.0 (1037) fixed:
If you are manually verifying your game files (via Steam or Epic Games), checking the version of the HorizonForbiddenWest.exe file is a great way to ensure the update applied correctly. horizon forbidden west update 1037 1580exe work
Then re-verify game files (Step 1) to restore any quarantined exe. For reference, official v1
The "HDR Max Luminance" slider may not function correctly, leading to improper brightness levels. you’ll experience the improved performance
Once the update works, you’ll experience the improved performance, reduced pop-in, and fixed water reflections that Patch 1.038 promised. Aloy’s journey through the Forbidden West is too beautiful to be blocked by a stubborn EXE error.
In the initial 1.0.37 build, DLSS 3 Frame Generation was sometimes disabled during cutscenes or UI screens, leading to visible framerate drops.