I have had Windows 7 since it came out. I do not like to use Internet Explorer, therefore, I use Mozilla Firefox. I used it when I had Windows XP and have never encountered the problem on that machine nor a Vista. But since I have had Windows 7 about 50% of the time I cannot open Firefox because it says it is already running. Which leads me to start the task manager and end the Firefox process and then open it. I have this problem on both my desktop and my laptop. It doesn't matter how long after closing the Firefox browser I wait because it still tells me it's already running. I have waited under a minute and also hours. Does anyone have this same problem or know how to fix it? Thank You -Christub P.S. I have upgraded to Firefox 3.6 but it did it on 3.5 as well.