Bernie, when I read your warning I did the same as Patty with the same result. I find Windows/I.E. any Microsoft updates can be long winded and take time . I don't worry about it.
It being a Service Pack it is probably the original program plus all the updates to the present time . Make sure it does not cause any problems, some times service packs do. If it does just remove it.
Heres hoping Bill Gates boys have got it right........Arkrite.