Everytime I shutdown my Windows XP, it comes up with the following screen which says

"Turn Off with Installing Updates"

(Of course, it also gives me an option as follows, "Click here to turn off without installing updates.")

Now, when I do normal shutdown asking it to Install Updates and Turn it Off. It does not install the updates and every subsequent time I try to shut down the PC, it still comes with the prompt "Turn Off with Installing Updates".

I managed to find out that this install was this

"Installing Microsoft SQL Server 2005 Express Edition Service Pack 3 (KB955706) update 1 of 1 .... "

Now, when I click on the Installing Updates icon (the yellow icon, that appears on the task bar near the clock), and Install it. It tries to install and it fails.

Now, why is this install alone failing?

Second, if we are not able to ascertain why this is failing, can we at least ensure that it is removed from the list of possible installs so that everytime it does not ask me to install it.