offers same updates again and again

My daughter, who has Windows XP Home Edition, keeps getting offered some
of the same updates again and again, even though they've been
successfully installed.

One strange thing she is doing -- she said she bookmarked the Windows
Update Site (that comes up when you choose IE -- > tools --> Windows
Update). So she just brings up the bookmarked site.

I know I've seen a solution for this, but can't find it.

Please help.

Jim