I have a very strange problem.  I have Windows XP SP3 Home Edition.  All of a sudden I started repeatedly getting the same Windows Update downloads.  I get the little shield icon in the system tray on the lower right side of the desktop, I click on it to install.  After the installation is finished, the same thing appears again, telling me to install it.

Does anyone have any ideas what might be causing this?

I think you can go online and get information on the specific updates.  Maybe they will have a solution on that.