I've been asked to update some computers running Windows XP (without any service packs) to Windows XP SP3. The computers don't have an internet connection (only a small intranet) and have never been updated since first install.
Do I need to install SP1a first, then SP2, then SP3, or can I install SP3 immediately?
And where do I find the right files, that don't require an internet connection during installation?