SP2 often causes problems with spyware, and IE has a habit of attracting huge quantities of the stuff, most without the user ever knowing about it.
Have you verified that your system is (relatively) spyware free? Also, have you tried a browser that's a little more secure like Mozilla Firefox? IE is a rapidly sinking ship, and personally I'd get off before you go down with it, but that's your choice.
Evertime I try to download this and up date my computer my Internet explorer comes to a screeching halt. I can opens my home page ok but then it takes literally 30 min to load each following page.I have tried numerous times over the last 6 mths and every time it has the same result. Please help as I have no more restore due to turning it off to do a virus scanning.