IIS 7 Application Pool stops automatically

Once, there was a issue where my application pool was stopping automatically. When investigating the issue, I found that after restarting and browsing my web service, I found my web service saying "application unavailable". Again, my app pool had stopped.

In EventViewer I found, "HipIISEngineStub.dll failed to load". I did not install any "HipIISEngine" and was wondering what could be the issue. A little googling helped me resolve this issue in no time. It seems a McAfee update on my web server caused this issue.

I edited IIS 7.0 applicationHost.config file and remove the following configuration lines:

• Edit %windir%\system32\inetsrv\config\applicationHost.config as Administrator.
• In the <globalModules> section, remove the following line:
• <add name=”MfeEngine” image=”%windir%\System32\inetsrv\HipIISEngineStub.dll” />
• In the <modules> section, remove the following line:
• <add name=”MfeEngine” />
• Save the file, then restart IIS.

Credits: http://chrisfleischhacker.wordpress.com/2013/12/16/iis-7-application-pool-stops-hipiisenginestub-dll-failed-to-load/