Mar 23rd, 2009. If you have problem after installing Internet Explorer 8 and want to remove it to revert back to IE 7, the Microsoft Fix-it team has developed an uninstaller for IE 8: UninstallIE80.MSI.
To have the Fix It guys remove Internet Explorer 8 for you, go to the “Fix it for me” section. If you would rather remove Internet Explorer yourself, go to the “Let me fix it myself” section.
When you remove Internet Explorer 8, your earlier version of Internet Explorer is restored with your customizations (such as add-ins, Favorites, and your home page).
Note that it will create a restore point before starting to remove all traces of IE 8 from system.
Moreover, in order to help users to prevent from installing IE8 through Automatic Update , Microsoft has also released IE Blocker 8.0:
Known incompatibility issues are listed here at Release Notes for Internet Explorer 8.
Internet Explorer 8 Guided Help.