Internet Explorer is Microsoft's web browser used for accessing websites on the Internet. There are several different versions of the IE browser, with the latest (as of 2011) being IE9. If you want to check and see the exact version of Internet Explorer you have on your computer, you can find out by looking at the properties of IE itself.
Open Internet Explorer.
Press "ALT" and "H" together to open the "Help" menu.
Click "About Internet Explorer." The version information is displayed in the popup that appears.