Firefox won't open, thought maybe deleted, updated all plugins, still no Firefox so downloaded Firefox, but won't install and message box keeps saying to close Firefox so it can install. HELP!

Last night my Norton told me to get rid of some of my programs so my computer would run faster. My computer was given to me with many programs already installed, and it is hard to tell from the names of programs what they actually do; but I figured if I could remove, then I could re-install if necessary. I removed a few before my brain was able to scream STOP. I cannot now remember which ones. No doubt this has everything to do with Firefox's "absence." (I do know that I did not remove Firefox itself, but possibly a program that plays a supporting role.) I'm dizzy trying to "fix" this, and if I was not able to LOL, I'd be crying all night! Thanks for any help.

Do a clean (re)install:
* Download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder] (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

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