Well... Some tips for ya Kenny...
Install
PestPatrol, and let it run in real time. It will zap spyware in real time (it has a neat feature where it beeps everytime it zaps one, and while you surf the web you hear it beeping constantly, with some pages going berzerk. Kinda creepy, so I turn off the beeping feature).
Since you'll most certainly be back there next week cleaning up their system, you may want to install
HijackThis, TCPView, Process Explorer and AutoRuns from
SysInternals,
NetInfo,
PacketMon, and perhaps a personal firewall which grants internet access only to apps the user approves like
ZoneAlarm (MikeyMike may suggest others). These tools should help diagnose and track down any "rogue" software.
Just last week I too was cleaning up a buddy's XP box. His was infected with a spybot and a nasty virus. I managed to clean both up nicely. Interestingly, the spybot was trickier to track down and used several spybot removers, and did a lot of the work myself. I first noticed it when I had his machine "idling" and noticed the LEDs on my router going crazy. I did a netstat and it scrolled off the page! So I installed most of the software I listed above, and when I ran TCPView I noticed that one particular instance of svchost.exe had over 50 live connections with IP addresses throughout the world! Using Process Explorer I was able to kill the right svchost.exe (it's normal to have several instances of svchost.exe running as it is a generic "host" process for most standard services). Anyway, I eventually tracked it down to something called "hotbar", which had some aliases (check for hbinst.exe on your HD & registry). HotBar is basically a browser extension much like the yahoo/google bars are, except it supposedly links to "Free XXX" and "Horny Teen Sluts", etc... Not sure how he got that?!? ;-) But anyway, this nasty little bugger installed itself multiple times all over the place, also calling itself SuperBrowser or something like that. I also found it in the "Install and Remove Software" control panel, and when I clicked on "Remove", it in fact re-installed it self!!! So I manually "removed" that
app from the registry with RegEdit. Good times!
- Mike