When I was using my firefox this morning (10/15/14) at work I had no problems with it. I run Windows 8.1. I closed it to go to lunch, but when I tried to open it upon my return, nothing happened. I'd click on the icon (both in taskbar and desktop) and it would not open. I shut down my computer and restarted it a few times and the same thing occurred. My Chrome opens up without any issues. So I uninstalled firefox, downloaded the newest version (33.0) and tried to install it. I double-clicked on the setup icon and nothing happens. I try to install it as the Administrator and nothing happens. I open my Task Manager and there is a background process running called "7z Setup SFX (32 bit)" that pops up when I double click the setup icon. I can't delete the setup icon until I stop that process from running (and I'm not sure it is running as it is using 0% of the CPU). I'm at a loss. Tried installing older versions of firefox and the same thing happens. Any help would be much appreciated. Thanks!