Microsoft released Internet Explorer 9 a few days ago. If you have installed the browser and find it buggy, you cannot directly go back and uninstall IE9 from the add/remove programs.
In order to uninstall Internet Explorer 9, you will have to follow the steps given below.
Step 1: Go to Control Panel and click on the "Uninstall a Program" link
Step 2: You will not see an entry for IE9 in the main program list. Click on the View installed updates link in the sidebar to see the installed updates.
Step 3: Scroll down till you see a section for Microsoft Windows and find "Windows Internet Explorer 9" in it.
Step 4: Right click on the entry and click on the Uninstall button to uninstall and remove Internet Explorer 9 (IE9) from your PC.