Those links for when you meet an infected Windows PC...

A recent ComputerWorld article made it obvious i'm a bit behind the battle
tool wise:

Suggested tools:

Autoruns: http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx

This utility, which has the most comprehensive knowledge of auto-starting
locations of any startup monitor, shows you what programs are configured to
run during system bootup or login, and shows you the entries in the order
Windows processes them.

Rootkits:

F Secure http://www.f-secure.com/blacklight/
Standalone or online scanner http://support.f-secure.com/enu/home/ols.shtml

GMER http://gmer.net/index.php

Anti-malware

http://www.malwarebytes.org/mbam.php

Online scanners:

http://www.eset.com/onlinescan/
http://support.f-secure.com/enu/home/ols.shtml
http://www.bitdefender.com/scan8/ie.html
http://usa.kaspersky.com/products_services/free-virus-scanner.php

http://onecare.live.com/site/en-us/default.htm?s_cid=sah

Some free anti-virus:

http://free-av.com/

Still doesn't help with stuff like this: http://blogs.zdnet.com/security/?p=2390&tag=nl.e550 - A js phish, finding what sites you're logged into, then make a pop up that imitates those sites to get your user details...