An anonymous reader writes "ZDNet has published a review of 8 antispyware products from Computer Associates, Lavasoft, McAfee, Microsoft, PC Tools, Symantec, Trend Micro and Webroot. Check out the Editor's Choice. Interesting winner ...."
I've used quite a number of these scanners on and on & off basis, and I think the reality is that you if you are truly to clean a machine out, you're going to need to use like three - five of these. Each of them captures a certain area, but none are the One Ring or anything.