Hi AllyH123 -
I am sorry you are having difficulties getting the engine installed. If you can go back to your first post, https://answers.unrealengine.com/questions/66997/i-installed-ue-and-it-is-a-ffv-file-and-which-appl.html, and add as much detail as you can about your problem, please be sure to review our suggestions for how to report your issues, and feel free to edit your post if you have any additional information to provide:
https://answers.unrealengine.com/questions/17546/how-do-i-get-help-with-ue4-installation-and-setup.html
I will answer all your questions on that first post,
Thank You
Eric Ketchum