To Fix the Problem:

Start > Control Panel > Programs & Features > (now look to the left) you will see a link Turn Windows Features On or Off, click it!

You'll see a new window titled Server Manager, now look to the right and click the Configure IE ESC, adjust your settings, meaning TURN IT OFF!

Refresh your browser, Javascript and/or AJAX functions can now get back to work. I'll elaborate on my thoughts about this "feature" later, but for now, to quickly post an easier-to-find solution I'll publish it now, hope this helps!