Windows might be trying to launch the game using your integrated graphics instead of your dedicated GPU. Search for Graphics Settings in Windows. Browse and add Hitman3.exe from the Retail folder. Click Options and select High Performance . Advanced Troubleshooting
Check out these video guides for visual step-by-step instructions on resolving Hitman 3 launch and DirectX 12 errors: How to FIX HITMAN 3 All Errors Fix not launching/Crash on Startup/Black screen | Hitman 3 TroubleChute Hitman 3 Executable Not Found Direct3d 12 High Quality
The game runs. You lose ray tracing, but gain stability. If this works, the issue is your DirectX 12 setup, not the game files. Windows might be trying to launch the game