While working today I got some weird ad popup saying "droid users enter to win ipad2" one of my coworkers was playing with my phone and clicked on the link for this which opened up the browser to some page when I saw this I closed it out but now I am worried that maybe it was some sort of adware or something else should I now install lookout or avg on my phone or is there something I can watch for to make sure it was really nothing?