Runtime Errors And Other Crashes

Make sure all your device drivers are up to date (especially your video card) and try running these prerequisites from Microsoft:


http://www.microsoft.com/en-us/download/details.aspx?id=5555
http://www.microsoft.com/en-us/download/details.aspx?id=21
http://www.microsoft.com/en-us/download/details.aspx?id=8109

Then try deleting your killingfloor/system folder and verifying your game cache in Steam - https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335