So, a few weeks ago, a download starting appearing whenever I entered certain sites (subscene, ultimateguotar.com etc). I.e. this is a malware download that I did not request. I found an old post on a appleforums that said you could block the hosting site, but I can't figure out how to block the correct site. (I tried asking on the apple forum, but for some reason I get an error message whenever trying to post there these days). When the download popup appear it says it's from a site called "cas.critero.Xom" (but with .com). I tried blocking that site, but to no avail. The user on apple.com added a block to the sites name, then /delivery, but I have no idea really.... So how do I stop this? I know it's not dangerous as long as I don't download it, but it's really frustrating since I visited these sites daily... Help... Purdy please.