The Turn off Data Execution Prevention for HTML Help Executible machine setting should be configured correctly. This policy setting allows you to exclude HTML Help Executable from being monitored by software-enforced DEP. DEP is designed to block malicious code that takes advantage of exception-handling mechanisms in Windows. If you enable this policy setting, DEP for HTML Help Executable will be turned off. This will allow certain legacy ActiveX controls to function without DEP shutting down HTML Help Executable. If you disable or do not configure this policy setting, DEP will be turned on for HTML Help Executable. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Turn off Data Execution Prevention for HTML Help Executible (2) KEY: HKLM\Software\Policies\Microsoft\Windows\System\DisableHHDEP