In the directory folder, choose the correct PhysX version ( version), right-click it, and select Install. Press Win + E keys to open the File Explorer and then locate the following directory:Ĭ:\Program Files (x86)\Steam\steamapps\common\killingfloor2/_commonredist/PhysX So, make sure that you install the correct PhysX version. If the version of PhysX is not supported or the installation failed itself, the Killing Floor 2 won’t start. Usually, PhysX is installed automatically by the game itself or Steam. Now, you can relaunch the game and check if the Killing Floor 2 not launching issue is resolved or not. Go to the Compatibility tab and tick the checkbox next to Run this program as an administrator.
Tip: If there is no shortcut, you can navigate to the C:\Program Files (x86)\Steam\steamapps\common\killingfloor2\Binaries path, and then right-click Killing Floor 2 and select Properties. Right-click the shortcut of Killing Floor 2 at your desktop and select Properties.
To fix it, you can run Killing Floor 2 as an administrator. Run Killing Floor 2 as an AdministratorĪfter investigating many user reports, Killing Floor 2 won’t launch when lacking an admin account.