Patti: Uninstall the existing flash player from add/remove programs, download and install fresh the latest version from here: Adobe - Downloads
. Do the same with Mozilla FF and download the latest version from here: Mozilla Firefox Web Browser
. Also uninstall the program JAVA (if you have it). Remember to tick mark the option where it asks you if you want to remove the extension/add on. Run cCleaner, tick mark all the points under Mozilla FF and Multimedia (see pic attached - it will be tick marked by default). Delete any chunks left inside you Computer/C: Drive/Program files/Mozilla Firefox. Restart, now with a clean install of both, browse and do the usual stuff you do with your browser and report back. You could try creating a new user account with administrator rights here: User Account - Create
and let us know if you notice any changes.