Visit the Microsoft Catalog Update site click here & download a few of the problem updates - they are all searchable via their unique KB numbers. Make sure to download the correct ones for your OS (XP) & type (32/64-bit).
Once downloaded, double-click on them one at a time to install. Once a update install completes, close its applet & double-click on another one & so on. Reboot after doing them all.
If the above works for a few, download the rest & install them the same way. G