When I download and save the Firefox file then try to run the file, it does nothing. I just had my laptop checked by Support.com for all the bad stuff that could be my laptop. It was cleaned up and only had one virus which was cleaned up. I had Firefox running on my laptop for many years, then all of a sudden it would not work. That's when I had Support.com check out my laptop. They couldn't find anything wrong but said to delete Firefox and down load a fresh copy. This I tried like I said to no avail. I have Norton Security Suite on the laptop and shut all of Norton down but still would not load. I have Firefox on two other desktops and it works fine. One is running WinXP and other Win7 Professional.