How the Blocker Toolkit Works
Q. What testing should customers do to validate the Internet Explorer 9 Blocker Toolkit Microsoft is making available before using it?
A. Because the Blocker Toolkit being provided by Microsoft relies on a new registry key that is used only for the purpose of disabling and re-enabling delivery of Internet Explorer 9, there should be no additional impact or side effect on the system. No additional testing should be necessary to validate the Toolkit.
Q. What registry key is being used to disable delivery of Internet Explorer 9?
A. HKLM\SOFTWARE\Microsoft\Internet Explorer\Setup\9.0
Q. What is the key value name and what are the value options?
A. The key value name is "DoNotAllowIE90". If the value is '1', automatic delivery of Internet Explorer 9 through Automatic Updates and the Windows Update/Microsoft Update site "Express" install option is disabled. If the value is not '1' or if the key doesn't exist, the system will be offered Internet Explorer 9 by Automatic Updates or if a user performs a manual update scan for important updates via the Windows Update/Microsoft Update sites.
