I performed a test on VMware using the top spyware removers
MAS Beta, Adaware SE Pro 1.6, Sopybot S&D 1.4, SpySweeper, Xofty Spy, and hjackthis.
MAS Beta kicked ***, then I installed all these together and they wiped it clean.
I use the same install, I just used XP, infected it, cloned it several times then intalled and ran the scans