Netcraft have released what appears to be a free toolbar for IE users on Win2000/XP, and it’s purpose is to protect users from phishing emails. Phishing is when you get an email purporting to be from your bank, or e-bay, or Paypal or some other institution and the email will contain a link they try to get you to follow. The link looks like it is to the banks servers, but it’s really pointing to some nasty site determined to collect your username/password and steal all your cash.
Firefox already has some protection against this, but if you must use IE, this toolbar might save you some money. Get your toolbar here.