To update or not update?

I have finally installed XP pro cleanly with parallels 3.0. Now...which xp updates do I need to install/sould I avoid? And, after installing the updates, do I need to rerun parallels tools again?
 
You just can download updates for windows without installing parallels tools.

When you install another version off parallels it normally autoinstall tools.
 
Microsoft will generally recommend which ones are needed on your system. I have installed them all, with no problems. You should not have to reinstall Parallels Tools after a Microsoft update (but you may after a Parallels update).
 
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