I'll also reference source 12 for Metro Exodus, which includes "fg-optional-bonus-content.bin" for original soundtrack and artbook.
If you only want to experience the core gameplay, you can safely uncheck this file in your torrent client or skip downloading it from direct links. fg-optional-bonus-soundtracks.bin
: Ensure you are using the main setup.exe provided. If you are on a newer version of Windows, try running it as an administrator and temporarily disabling User Account Control (UAC). You might also consider running the installer in Windows 7 compatibility mode. I'll also reference source 12 for Metro Exodus,