I downloaded IE7, and was so annoyed by how slow it was I've reverted back to IE6, but it's now slow as well, especially downloading pages with pictures.
I then did a system reset to before i first loaded IE7, but it's made no difference.
Forget IE7 and download Mozilla Firefox - search for it on Google. I think it's better, and you've nothing to lose by trying it. It is free and it works on Windows, Linux and Mac systems.