Cannot Set Display Mode !!better!! — Serious Sam 3

Go to your Serious Sam 3 installation folder, look for a folder named _CommonRedist or DirectX , and run dxsetup.exe . Alternatively, download the DirectX End-User Runtime Web Installer directly from Microsoft to fix missing legacy files. ✅ Summary of the Fix

If a corrupted configuration file is forcing an unsupported display mode, deleting it will force Serious Sam 3 to regenerate a fresh file with default, safe settings. Press Windows Key + R to open the Run dialog box. serious sam 3 cannot set display mode