Question about cleaning up infections

Hello everybody, I hope this is the right forum for this topic. If it isn't, then I apologize in advance.

I have to drive over to my friend's house in a day or two and fix their computer. The problem is that they are getting a pop-up warning from windows firewall that says something along the lines of "Windows has stopped a potentially malicious program from installing software."

The only thing I know about it, is that the program is apparently called "trojan.zlob.g". I'm pretty good with computers, but i've never had to deal with any type of malware before, so I'm not really sure how to handle it. I've downloaded all of the programs from the READ & RUN and burned them to a disk already.

I haven't been able to actually see the computer myself yet, since it's about a two hour drive to get there. So I'm not sure what else might have gotten a hold of his system. It doesn't have firefox, antivirus, or firewall, and probably hasn't been updated in months.


I guess my questions are this:
Are there any other programs that I should bring along to fix his computer? I've got all of the ones from the XP cleanup guide, plus defraggler, ccleaner, autoruns, and processexplorer.


And my second question is this:
Should I do anything that's in this article? And if so, before or after I run the XP cleaning instructions?
http://www.codinghorror.com/blog/archives/000888.html



Thank you taking the time to read my question.:cool