I am being plagued by something called "Messenger Service" which pops up on my screen many times a day, regardless of what I am doing. I have had as many as nine messages all at once, and have to manually close each one. The message is to visit http://www.easypopupblocker.com for information about how to block all pop-ups. My present blocker (Pop-Up Stopper) doesn't do a thing. Is the "Messenger Service" somehow embedded in my computer? And is there any way to get rid of it? I have run Ad-Ware and Spybot, and they haven't found anything.