Why does my Vista computer keep installing the same Microsoft update over and over again?

Security Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB936181)

Why does my Vista computer keep installing the same Microsoft update over and over again?norton 2008

Are you sure it really did install them ? look under "view update history "under windows update.

Why does my Vista computer keep installing the same Microsoft update over and over again?pop up blocker

maybe this is becuz its not installing right if after 3 times of it dwnloading and it still keeps on i suggest yu contact microsoft i have vista and it does have alot of minor provs like the one that makes the display driver stop working and recover i got that one fixed i can help yu out with this if yu have this prob also, if yu have other vista probs check in with me ill do my best to help yu out like this one