Also check out this site.
UPDATE: The simplest fix, which worked for me, was to reset my home page to a different home page by clicking “Tools” and then “Internet Options” from my toolbar. Then I deleted the Spy Wiper cookie. I forget what it’s called, so you might have to delete all cookies, which is a pain — but less of a pain than Spy Wiper.
UPDATE x2: If, when you try change your home page by clicking “Tools” and then “Internet Options” from your toolbar, you are unable to do so because of system restrictions in effect, you may need to edit your registry. I do not recommend this if you do not know what you are doing. Bad Things can happen when you edit your registry, and I am not responsible. That said, if you still want to try, instructions are here. You need to disable the restriction preventing changes to Home Page settings.