Last weekend I got an unending series of pop ups "offering" to sell me protection from virus and other things of the night that attach computers. Since I already had McAfee I declined but they kept coming; the pop up claimed that scanning my computer showed many trojan and other invasions. I could not stop the pop ups but my university technicians have a program that blocked it. Several others in our area have received the same "unending" offers. Don't buy! Unfortunately, I cannot tell you how to avoid the animal or how to get rid of it if it attacks. But someone out there must know and if not I'll get the program from our techies and send it on.