If you are running a version of Windows other then XP SP2, then you REALLY need to download Firefox and stop using IE. The reason? Well apart from the extra features and stuff, it’s a security thing. Namely with IE you have none.
A new version of Mydoom has surfaced that will affect any and all fully patched versions of IE prior to XP SP2. Don’t take my word for it, read this Eweek article for the details.
Franki