HEEEELP

[BlackSniper]

I would say that you mush delete nord invasion and download it again. Than we know sure that it isn't nord invasion.
And if you got one of the other mount and blade's, like with fire and sword and just mount and blade, just start them and look what they do if you start them.

And if it still not working, i would advice to reinstall Mount and Blade Warband (or if the others also not work, reinstall them all)

Goodluck!