 An antivirus software on your computer that's meant to protect you could be used to extort you. Scammers are gaining access to your computer and holding it for ransom, asking for money in exchange for fixing the issue. But by the time consumers realize it's a scam, it's too late. Clark Howard shows you the red flags to look out for when it comes to computer scams, how to avoid them and protect your money. Thursday on News Center 7, beginning at 5.