I want my IE6 back!

I foolishly upgraded to IE7 and it is especially bad. In fact, it almost doesn't work on my machine, which has Windows XP Professional and many applications installed. I wish I still have IE6. I use Firefox as my main browser, but some sites, such as the Zogby poll, work best with IE6. (Actually, IE7 is working acceptably on my other machine, the one with Windows XP Home and fewer applications installed).