i get the free code.ready but why can not use spyware doctor 6.0.0.386??pls help

裝左PC Tools Internet Security ,but can not kill this 毒=>(spyware.known_bad_sites)
how come ar   pls help!!!!

名稱: Adware.Advertising
描述: Advertising companies store cookies on a user's computer to serve targeted ads based on the web surfers interests when visiting a website serving their ads.
名稱: Spyware.Known_Bad_Sites
描述: Indicates that a known bad site may have hijacked. Adware, Spyware and Phishing sites may use the Windows hosts file to redirect your browser to a malicious site when you try to access a valid site such as your Bank.