Hi,
When I start the game, during the little splash-window loading, it crashes. I am unable to start it. I don't even get into the game. Has anyone else had this problem? I'm on Win10, with a fairly fresh windows. No funny antivirus-programs or other obvious problematic software installed that I can think of.

Did you look here:
[url=https://www.pcgamingwiki.com/wiki/Mount_%26_Blade_II:_Bannerlord]https://www.pcgamingwiki.com/wiki/Mount_%26_Blade_II:_Bannerlord[/url]

Thank you. It was my Windows antimalware-protection that kept the game from loading.

Nothing there helps. Another idea?

Sorry no, I do not have the game myself. Just make sure your graphics card is supported. I cannot really say anything else now.

I have the same problem, I have attempted every recommended solution barring blood sacrifice. Ultimately it seems like the only viable solution is requesting a refund.