How to Clean Up a Windows Spyware Infestation

One of the best technical blogs is Coding Horror by Jeff Atwood. Here he describes how to Clean Up a Windows Spyware Infestation.

Now we're leaving passivity behind, and unwisely browsing the open internet with the unpatched, six year old original version of Internet Explorer 6.0. Danger, Will Robinson! I left Task Manager running as I browsed to MegaGames, downloaded a no-cd patch, and... nothing. I then visited GameCopyWorld, downloaded a no-cd patch, and... all of a sudden, it's crystal clear who the culprit is. [...] This comes as a shock to me, because GameCopyWorld is recommended often in gaming forums. I consider(ed) it a reputable web site. I've never had a problem with the site before, because I usually surf with the latest updates. But the unpatched browser spyware infestation from visiting GCW-- just from visiting the web pages, even if you don't download a single thing-- is nearly immediate and completely devastating.