Script Download:  
The script is available for download in Microsoft Script Browser for Windows PowerShell ISE. You need to install the Script Browser application first, and search for the script sample title.

This script sample shows how to enable Enterprise Mode in Internet Explorer 11.

Enterprise Mode is a new feature in Internet Explorer that allows businesses to use old web applications in modern versions of IE. This feature is designed to help businesses who still need Internet Explorer 8 for some reason to upgrade to a more modern, secure browser.
But the Enterprise Mode for Internet Explorer 11 is turned off by default. And this script can help you easily enable the Enterprise Mode.

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You can find more All-In-One Script Framework script samples at