Ads are a necessary evil. Great sites like Alldeaf use it to keep the websites up and operational. However, there comes a time when the ads are not useful. There are ads that will follow you across the Internet. Not all are good or useful. MacKeeper is one of these. It is *not* a product made by Apple or Macintosh for any of their products. It is *not* a PC product, either. I have 3 Macs on line. And despite the fact MacKeeper has declared a number of times that one of more of my machines has a devastating virus on my Mac Pro or Laptop, I can find none. It's probably because I do not own either of those machines. Enough already! If you see stuff like that ignore it and move on.