"GET RID OF INTERNET EXPLORER AND MOVE TO FIREFOX"
I second that. Haven't had a pest in months.
That's very good advice. Recently I reformatted one of my boxes. After installing XP Pro i went out to a couple of sites with IE to grab a couple of things. I download and install Firefox, and haven't used IE on that computer since.
Yesterday I go back to that machine, open IE for Windows Update, and the homepage was changed LOL. I have no idea how or when it happened, but it was definitely malware, because it was changed to one of those spammer search engines.