How to run all three versions of Internet Explorer?

Question

Is there a way to run Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 at same time or one after the other, to test UI of a web application? Or is there any other solution for this?

Answer 1

Virtual PC with multiple virtual machines, each with a different version of IE.

Microsoft even makes Windows XP/Vista + IE6/7/8 VM's available to download here.

Answer 2

Use IETester - it allows you to test your site on all versions of IE.

http://www.my-debugbar.com/wiki/IETester/HomePage