By default, each user is prompted to choose 1 of below 2 options at the first run of IE 9.
· “Use recommended security and compatibility settings”
· “Don’t use recommended settings”
If you choose the first option, below 2 registry key values will be set to 1,
• HKCU\Software\Microsoft\Internet Explorer\BrowserEmulation\MSCompatibilityMode
If this key is set to 1, IE will download a site compatibility list from Microsoft website. The list contains compatibility information of some websites. IE renders the websites in a specific compatibility mode based on the list. See http://technet.microsoft.com/en-us/library/ff716425.aspx
• HKCU\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9
If this key is set to 1, IE9 will enable SmartScreen filter version 9(compared to version 8 in IE 8). For more information regarding SmartScreen, refer http://windows.microsoft.com/en-US/windows7/SmartScreen-Filter-frequently-asked-questions-IE9
Note that both keys are set to HKCU, so that users can have isolated settings.
In case the second option is chosen, IE will set the above 2 key values to 0.
Juntao Zhu from APGC DSI Team