CWShredder oder HijackThis könnten helfen.
Findet man unter http://www.spywareinfo.com/~merijn/
CWShredder: A small utility for removing CoolWebSearch (aka CoolWwwSearch, YouFindAll, White-Pages.ws and a dozen other names). Spybot S&D and Ad-aware tend to forget essential parts of the hijack, so until they update, you can use this to completely remove the hijack.
HijackThis: A general homepage hijackers detector and remover. Initially based on the article Hijacked!, but expanded with almost a dozen other checks against hijacker tricks. It is continually updated to detect and remove new hijacks. It does not target specific programs/URLs, just the methods used by hijackers to force you onto their sites. As a result, false positives are imminent and unless you are sure what you're doing, you should always consult with knowledgable folks (e.g. the forums) before deleting anything.