For at least the last 2 weeks, every time I turn on my PC I get told that "Security Update for WindowsXP (KB942830)" & "Security Update for WindowsXP (KB942831)" need to be downloaded. I always download them and my PC is set to install them on shutdown. But then next time, there they are again. Other updates have appeared and been installed without issue, so I'm thinking these two updates are a bit odd?

Any ideas?