Flexera has released an advisory which informs that InstallShield 2011-2014 may crash after the installation of KB2962872 (MS14-037) which was released last tuesday.
Currently the only way to restore functionality is to uninstall the microsoft patch or implementing the workaround in the following article:
http://www.flexerasoftware.com/landing/Microsoft-Security-Update-IS-AR-KB2962872.html
Flexera is working with Microsoft to resolve the issue.
Feel free to contact Ontrex SPA if you need any further assistance in this matter.