I am not sure where it comes from, but about once every other day a message pops up asking me to scan my computer for problems. It is clearly a trying to direct me to a spyware site and it is a pain in the butt because I have to use CTL, ALT, DEL to close that screen out and have to restart my web browser. Another sign of a poorly designed hacking site. If it is not that annoying screen, twice my virus scanner/spyware scanner picked up a potential problem which is even worse. Does this site accept money from known problematic sites? This is the only site I have had this many problems with and I am guessing one of the sponsors is causing the problem.
Just a general warning. If a popup sight every asks you you to "Click Here" when it looks suspecious, usually claiming it found a spyware or virus, do not click it or close it. Right click the bottom taks bar and click close or if that does not work as with this sites, CTL, ALT, DEL close it. It will most likely crash your browser, but it will prevent you from going to a spyware site or downloading a virus or spyware.