Published Internet Explorer renders the session in an Active State after session disconnect. Configuring registry setting to include iexplore.exe in the LogOffCheckSysModules value would cause the application to close immediately after application launch.

Force Internet Explorer to execute a single process by configuring the following

Navigate to key HKCU\Software\Microsoft\Internet Explorer\Main
REG_SZ: TabProcGrowth
Value: 0

If not available, manually configure "TabProcGrowth " and set value to 0

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Problem Cause

The additional IE processes are normal and are created to make Automatic Crash Recovery possible. However, if one of these processes hang this could prevent graceful logoff for user

https://blogs.msdn.microsoft.com/askie/2009/03/09/opening-a-new-tab-may-launch-a-new-process-with-internet-explorer-8-0/ https://answers.microsoft.com/en-us/ie/forum/ie11-windows_7/why-do-multiple-at-least-2-iexploreexe-processes/21e72a38-9a54-428a-8834-0a3a551eed75