Somehow" Bing" showed up as my browser. When I would click on FF on my desk top the Bing browser page would come up. The only way I could get FF browser was to click on "most visited" and select FF from the options. Then today, when the Bing browser page came up FF didn't even show in most visited. So I decided to try and download FF. I downloaded FF, then ran set up but when set up was finished and I clicked on "launch" it took me back to the set up page. I turned off the computer and clicked on the FF icon on my desk top and it took me back to the opening window for Firefox Setup.I'm in a loop and can't open FF. HELP