i've just installed sb and scan my computer then result show that it is infected with cnsmin, avenue A.inc , doubleclick. after sb fix the problem then i scan again today where i found that i again infected with same infection.
pls advice me of how to avoid the infection again, thanks.
Doubleclick (and others like Advertising.com, Avenue A, Inc, CasaleMedia, Fastclick, Hitbox, Mediaplex etc.) are so-called tracking cookies. It is quite common for popular websites to employ such tracking cookies from third parties. They use them in order to track the users' surfing habits on their websites. As I said, these cookies are from third parties but they are employed by the site. There is a tool in Spybot-S&D: BrowserHelper, i.e. a bad download blocker for Internet Explorer. With this tool enabled such tracking cookies will be blocked. In order to activate this tool, please run Spybot-S&D and go to the "Immunize" page. Checking the checkbox will enable the BrowserHelper, a drop down menu will appear giving you some options. You should select "Block all bad pages silently". With that option set the notifications will no longer come up, but you will still have the protection.