IE>Tools>Internet Options
General Tab>'Browsing History' section>Settings Button

Check for newer versions of stored pages
To set to 'Everytime I visit the web page'

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
SyncMode5 REG_DWORD 3

Group Policy Setting for Enabling Mixed Content

This gets rid of that mixed content error on some pages

Tools>Internet Options>Security Tab>Internet>Custom Level...
Miscelaneous>Display Mixed Content Enabled

Computer Configuration/Administrative Templates
User Configuration/Administrative Templates

Windows Components/Internet Explorer/Internet Control Panel/Security Page/Internet Zone

Windows Components/Internet Explorer/Internet Control Panel/Security Page/Locked-Down Internet Zone

Display mixed content Enabled
 Display mixed content Enable