If you have installed the Internet Explorer 9 RC & want to remove it. You can do it in a similar way as in case of IE 9 Beta. Just follow the steps below.
1. Open Control Panel and click on “Programs and Features”.
2. Now click on “View installed updates” link given in left sidebar.
3. You’ll see “Windows Internet Explorer 9 Release Candidate” update listed there. Select the update and click on “Uninstall” button in toolbar or right-click on the update and select “Uninstall” option.
4. That’s it. It’ll require a restart. After restarting IE9 RC will be removed from your system.