If you are having issues with the game not launching or crashing on launch then I would strongly recommend that you first check to see if you have any sort of security software which is blocking the process.

If the launcher fails to open after pressing the "Play" button in Steam then you should check to make sure that you are not trying to run the game in compatibility mode.

• Right click Mount & Blade: Warband in your library
  
• Select "Properties"
  
• Select the "Local Files" tab
  
• Select "Browse Local Files"
  
• Right click mb_warband.exe
  
• Select "Properties"
  
• Select the "Compatibility" tab
  
• Ensure the "Run this program in compatability mode for:" checkbox is unchecked

If you are still having problems you should unsubscribe from any mods you have installed through the workshop and delete them from the workshop folder. The workshop folder can be found:

• Steam > steamapps > workshop > content > 48700

If unsubscribing and removing the contents of this folder does not fix your problem then I would suggest that you try to verify your game files which you can do by:

• Right click Mount & Blade: Warband in your library
  
• Select "Properties"
  
• Select the "Local Files" tab
  
• Select "Verify Integrity of Game Files"

If you are able to see the launcher, but the game crashes after selecting "Play Mount & Blade" or after the intro video, then I would suggest that you try launching in Windowed Mode which you can do by:

• Open the launcher
  
• Select "Configure"
  
• Select the "Video" tab
  
• Check the "Start Windowed" checkbox
  
• Select "OK"

You can then pop the game back in to full-screen mode by using "ALT + Enter" at the Main Menu.