Won’t launch/start issue occurs in AdVenture Capitalist when your operating system is not compatible with it. Don’t worry, I’ll tell you how you can fix it. Just follow my instructions.

Fix 1: Run AdVenture Capitalist in compatibility mode

Do these things:

• Right-click on AdVenture Capitalist (in your Steam game list).
• Go to Properties > Local Files tab.
• Click on “Browse” (to go installation directory).
• Right-click on “adcap.exe” and go to its “Properties”.
• Go to “Compatibility” tab.
• Choose “Windows 7” or “Windows XP” from the Drop-down list.
• Press “Apply” button and close the window.
• Restart Steam.
• Launch AdVenture Capitalist.

You can enjoy the game now 🙂