Installing and Uninstalling Internet Explorer 9
To install Internet Explorer
system requirements for Internet Explorer 9
see Prerequisites for installing Internet Explorer 9
Go to the Download Internet Explorer 9 webpage(http://windows.microsoft.com/en-in/internet-explorer/ie-9-worldwide-languages).
Select the language you want to install and your version of Windows, and then click Download.
In the File Download dialog box, click Run, and then, in the User Account Control dialog box, click Continue.
Click one of the following:
Restart now (recommended) (to finish the installation process now).
Note:After the restart, the previous version of Internet Explorer that was on the computer is restored(IE8 or IE7).
How to uninstall Internet Explorer 9