My suggestion would be to download a program like
Spybot S&D and see if it finds anything.
http://www.safer-networking.org/index.php?lang=en&page=download

You might also check out this article.
http://www.spywareinfo.com/articles/hijacked/
---
Jacob Joehl wrote:
  I have been experiencing the same problem.
Jacob
  ----- Original Message -----
From: "Dino Cardamone"
Sent: Saturday, September 13, 2003 12:49 AM
Subject: browser invasion
Greetings.
I just now have taken on some kind of unknown program which is
forcing my IE
browser to not go to the pages I tell it to go.  I already tried several
attempts to close and reopen IE, but the same thing keeps happening.
//snip//


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