This is a "newbie" tutorial, so I guess "newbie" = pay money until all the problems go away. The methods stated in this tutorial have been covered in (all) other "secure xp" articles wasting space on the internet.
To review:
firewall, anti-virus, anti ad and spy programs, and hit windowsupdate.microsoft.com
Look, I just wrote my own tutorial!

How about a tutorial in setting up ZA, norton, iptables, or other firewalls. Just installing the program does a little to secure the machine, but that's not enough to really stop anyone.

This tutorial also doesn't cover shutting down services that are un-necessary or security risks. How about the messenger service? How about disabling NetBIOS if the system doesn't need it?

Also, killing activeX in IE can be a great way to limit spyware on a new install. (if not killing IE all together, but that's not necessarilly "secure")

How about creating a log of running processes and a log of programs that startup with windows? Having a log (one you create yourself, hijack this, other audits) of a fresh install that you can compare later is a great resource.

Let's also talk about what to do with the administrator account. like re-naming, password protecting, and creating a "guest" administrator. Also, don't do everything in an admin account. User or power user is great for everyday use.

Speaking of passwords, c1aw3D|<|cK (clawedkick for you non-leet readers) would be much harder to break than *shudder* secret, zzzzzzz, or asdfghjkl.

There is more, but this is just my little rant.

edit: in case you can't tell, i am working on a tutorial like this myself... but i'm actually putting time and research into it with links to tools and resources that would be helpful.