Internet Explorer 9 is still in beta and only recommended for testing purposes. But many people, out of curiosity, install IE9 without having to know if it is beneficial for them or not or wait for the final version to be released. Fortunately Internet Explorer 9 is installed as a Windows update and can be uninstalled easily like most other updates.
First of all if you want to test and install Internet Explorer 9, then download IE 9 in your favorite language and run the setup file to install IE9. The installation is straight forward and does not require any kind of expert knowledge in order to install it.
If you are not satisfied with IE9 beta and want to uninstall it, then you can follow the steps below to uninstall Internet Explorer 9 from your computer.
Go to Control Panel and open Programs and Features.
Click on View Installed Updates on the left hand bar.
Locate Windows Internet Explorer 9, right click it and select Uninstall.
The only problem I see in installation and un-installation of IE 9 is that it requires the computer to be restarted in order to install and uninstall the browser completely.