Start menu -> Programs -> All Programs -> Windows Mise à jour
But that will encore just open IE vers le web site. The seulement other way to do it is to read through reams of ms knowledge base articles for Server 2003 to find everyone one that includes a windows mise à jour télécharger, cross reference that for mises à jour that are déjà installé on yoru ordinateur, and télécharger each mise à jour from microsoft's télécharger site and installer it by hand. It'd take you a year or more to finish.
Perhaps we could do a little better if we understood your motivation for the request.
Mise à jour
As Je pense about, the windows mise à jour site fonctionne by running an ActiveX control. Vous pourriez be able to build another programme that hosts this control, but I doubt it. And even si vous did, the control would encore need to connect to Microsoft's windows mise à jour site to téléchargez le patches.