Somehow or other, I downloaded something called PC Registry Cleaner onto my computer, to fix a problem. Of course, they said it was "free" so I’m a sucker, and now they want my credit card number before they will exit from my computer. It shows up every time I go to my Yahoo page and it is really ticking me off! If I give them my credit card number (they want security code, too) how do I know I won’t be ripped off? Buyer beware! (Who can I report this VERY unethical behavior to, and get quick results?)