Step 2. Navigate to the Library tab, and then right-click Crusader Kings II from the left pane and select Properties. Step 1. Right-click the Steam launcher and select Run as administrator. In this case, you can try verifying the integrity of game files. Verify Integrity of CK2 Game FilesĬorrupt or incomplete game files are also responsible for Crusader Kings 2 crash on startup. For Avast, you can refer to this post “ Beast Ways to Disable Avast for PC and Mac”. To fix the issue, you can try turning off the Windows Firewall or antivirus software. Disable Your Antivirus Programs/Windows Defender FirewallĪccording to many user reports on communities, some antivirus programs like Avast can provoke the issue “Crusader Kings 2 crash on startup”. If it still doesn’t work, try the following solutions. In addition, you can restart your computer to turn off unnecessary programs completely. So, we recommend you close other third-party programs in Task Manager first. If any programs are conflicting with the game, you may experience Crusader Kings 2 crash on startup. Disable Fullscreen Optimizations and Run the Game as an Administrator Disable Your Antivirus Programs/Windows Defender Firewall
