If your Firefox is located in the standard installation location - that is, given that you didn't change location during install - you should be able to find it in the '''C:\Program Files\Mozilla\Firefox\''' folder. Or you can try searching your hard drive(s) for it, by using menu Start -> Search > for Files or Folders... -> in left-hand Search Assistant box, click "-> All files and folders" -> enter "firefox*.*" and click button "Search". If this does not find the Firefox executable file, it may be missing on your system. See our article [[Installing Firefox on Windows]] for help with installation. Please let us know how above works out, and if we can be of further assistance. Detailed feedback is appreciated and helps us to help more users with similar problems.