How to protect yourself from the Fake Antivirus:
1) Beware that they are exist and that you will come across it while surfing the world wide web.
2) If you see the pop-up that warns you about your PC being infected, don’t click to download the software that they are try to sell you. Try to X-out from the page.
3) Only buy the antivirus software from legit company like Symantec, Sophos, Trend Micro and so on.
4) If you are infected with the fake antivirus then you need to immediately do the following:
-Install and scan your PC with free software like Malwarebyte or Microsoft Security Essential to get rid of any malware that are hidding on your PC. Here are the link to download these softwares.
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e1605e70-9649-4a87-8532-33d813687a7f
http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html
-Install and scan your PC with free software like Malwarebyte or Microsoft Security Essential to get rid of any malware that are hidding on your PC. Here are the link to download these softwares.
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e1605e70-9649-4a87-8532-33d813687a7f
http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html
5) More useful information on how to protecting yourself from the Fake Antivirus
http://its.uiowa.edu/apps2/support/article/1129
http://www.techlicious.com/how-to/protect-yourself-from-fake-security-software/
http://www.techlicious.com/how-to/protect-yourself-from-fake-security-software/