1.Install Norton Antivirus Cooporation 7.01 with real-time protection.
A warning meesage is given when the webpage you surf has this kind of virus and then Norton will put the web page into quarantine and set the file as no accessed.
2. In windows 2k, go to c:/document and settings/Your LOGINNAME/Local Settings/Temporay Internet Files, delete the files which gives the warning. Sometimes, you should close the brower firstly.