The message “Warning visiting this site may harm your computer” can either come from your antivirus app. or from your browser (Chrome, Firefox, …).. To know whether your Firefox, IE. Chrome has been hijacked or not by some virus is easy to tell. If you ever see a software program being pitched or a recommendation to a product then the message is false and you should not trust it. For exact examples or to learn how to solve this check out this Warning: Visiting This Site May Harm Your Computer!.

The same is true if you do a Google search and notice some extra text under the Google search box recommending out a certain security client. Again, if you do visit some page everyday. Your computer is infected by some virus if upon visiting that good and know web page, you do get the warning we talked before. Most of the time, those viruses are not easy to remove. Another place to go to learn more about similar threats is this Spyware Removal site.

Once again, getting such warning on every site you do visit is a good way to know your computer is rather infected. To solve this problem: try to reset your IE (or Firefox, or Chrome, …), sometimes it works. For some of you, it will indeed work. In any case: always perform a full system scan with your antivirus program.

Your computer has a deep infection (with more than just bad program on it) if nothing has really changed after that. Try to read a lot about the fake antivirus program you are told to buy, this will help you to understand it. Search for this program (just write it down somewhere) on one of the websites I did mentioned above. Some tutorials will be found showing you how to remove the bad application you have on your computer.