If you had just downloaded and installed new Internet Explorer 9 Beta,and now you are looking to uninstall it then here is the simple method :-
- Open your Control Panel and click on Programs And Features,
- Now click on View installed updates from the left hand side pane,
- Right-click Windows Internet Explorer 9, click Uninstall, and then, when prompted, click Yes.
- It will ask you to restart your pc to complete uninstallation process.