Well I have all of the freeware avaliable (Ewido, A-Squared, Spybot, Ad-Aware SE, Spyware Blaster, Spyware Guard, etc.), so SpySweeper or Spyware Doctor are for their shields and extra, more thorough scanning packed in to one program incase I think I'm infected with non-viral malware but want only one, decent diagnostic scan instead of multiple. Also, as mentioned the shields/filters are also a plus and I like using them rather than a company firewall as opposed to Windows Firewall. In regards to not being able to remove the malware, I have killbox. Merely copy & paste the location and everything is bye-bye.