Firefox 5 is installed. It won't open. I tried to uninstall and it says close the program. I don't know how to do this since it isn't open. Can I go back to version 4?

Question

The program was installed on Friday morning though it didn't happen fast and I forgot and left the computer running when I went to work. This happened to be the day that my internet connection was cutoff because I was switching from cnet to Qwest as my ISP. (Still don't know why they did this, but Qwest helped me reset the modem and I can use Internet explorer.)
Why won't Firefox open? It must think it is open.

Answer 1

You probably have other problems but for a start right click on your task bar and click on Start Task Manager. In "Applications" if Firefox is shown, click on "End Task". In "Processes" if Firefox.exe is shown, click on "End Process" and ignore the warning and click"End Process" again. Wait for a few seconds then start Firefox in the usual way. There is a chance that this may solve your problems.
If not, you probably will need to do a complete uninstall and re-install. If you can't start Firefox you could try starting in Safe Mode - Hold down Shift key as you double click on the Firefox icon>ignore the page that opens>and Continue. If you've been able to open Firefox you could work through this Troubleshooting Procedure -
https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes
If at any stage you are not making progress, report back here for best advice on an Uninstall/Re-install which is quite likely to be necessary.