The best part of this article about testing IE in a VM are the comments at the end:
“[IE 10] gives you access to IE 5.5, 7, 8, 9, and 10 preview all within the same program (and you can easily switch rendering engine with Alt-5/7/8/9/0)”
and a reply:
“Not even IE10 supports IE6! Why should we?”
Originally shared by Noe Nieto