You can download the standalone 1.038 executable from a trusted source (like a friend’s working install or a backups forum – proceed at your own risk). Replace the broken exe in: ...\Horizon Forbidden West\Binaries\Win64\HorizonForbiddenWest.exe
Regardless of the number you see, the update is universal. It transitions the PC version to the latest "Complete Edition" codebase, syncing it up with the PlayStation 5 version. horizon forbidden west update 1037 1580exe work