As venney said, you do not have the liscence of your OS. Hmm so, windows won't let you download them from he AU (Automatic Updates). If I'm not correct please tell me. If you want to install these updates, I recommend that you install them, try them manually from the microosft website (use the search). Or else if you will find it difficult to find them I don't know if someone can send them to you. But 99% you can, I hope.
Hmmm interesting......a free OEM O.S. from Microsoft. Where do you live ???? They were giving a Critical Updates and Service Pack cd for free but it only covered I think up to Feb 2004. Anything new after that would need d/l from the site.
You can just a purchase a license, use you friends O.S. disc and your license and you will be set