I'm sure people are aware of this one but just in case, theres also one that tries to install stuff from C2 or LOP.com, even after running adaware and spybot search and destroy it had killed my explorer to the point where i had to completely uninstall it, mess with registries etc in order to be rid of it totally, in most cases it will "tell" you you need this software to use the site properly which is a lie and mmisleading in the first place but i have had LOP.com self install as well from a popup window for a site i had no intention of looking at....