I have a new Gateway laptop with Intel Core i5 2.26 Ghz and4 gb ram. I downloaded Firefox immediately, my browser of choice. However, what I've discovered is that almost immediately Firefox would open an unrequested new browser window when I click a link. E.G. I was on Yahoo today and clicked a link to daniweb after doing a search. (I was testing the theory.) Almost immediately there was a very quick flash of my browser window, almost as if something was opened and immediately minimized. After that daniweb loaded. If I go to the start bar and hover over the Firefox (Using Win 7) icon, it shows only 1 open browser window. About 30 seconds later though, the new browser window pops up in front of the Daniweb window. This time, the new window contained the following URL... http://www.yellowpages.com/raleigh-nc/programming?From=MRCH2 As you can see, it basically did a yellowpages search for programming in my area, presumably because I am going to an IT site. And now, if I hover over the Firefox icon on the start bar it shows to open browser windows.
The window which pops up unrequested is frequently yellowpages although sometimes it's a news site with a search for whatever I had clicked on. Occasionally it has been a "you have won site". I have pop-up blocker turned on and have tested through various test sites that pop-up blocker is in fact working. In some ways, this is more insidious because it's not a pop-up like we think of a pop-up, rather it's an entire browser window.
I have googled and googled trying to find a solution and thus far no one else has posted anything similar to this problem.