Uninstall Internet Explorer (IE) 9 from windows 7

1. Click the Start button , type Programs and Features in the search box, and then click View installed updates in the left pane.
2. Under Uninstall an update, scroll down to the Microsoft Windows section.
3. Right-click Windows Internet Explorer 9, click Uninstall, and then, when prompted, click Yes.
4. Click one of the following:
   • Restart now (to finish the process of uninstalling Internet Explorer 9 and restore the previous version of Internet Explorer).
   • Restart later

 source : http://windows.microsoft.com/en-US/windows7/how-do-i-install-or-uninstall-internet-explorer-9