Thank you for your help. I just downloaded the .zip version and ran it twice. Nothing happened. No Window. Maybe a quick process appearance and disappearance, but the game didn't start and boot to a menu. Both log files are pasted here.

What did you do?
Launched Factorio from Steam (also tried the exe directly at ...\bin\x64\Factorio.exe). Vanilla, no mods, on a clean install.

What happened?
The game fails to start. Steam shows it running for a second, then it closes with no window and no error dialog. The log always stops at the ...