What anti-parasite tools do you use?

Here's why. Both copy and paste as well as drag'n'drop failures have found to be signs that SPYWARE is on the host machine.

All free tools are available from http://forums.majorgeeks.com/showthread.php?t=35407 and my short list is Adaware, Spybot, Cwshredder, Stinger and Housecall.

Bob