firefox refuses to open after booting OS (Windows 7)

Avast Free Antivirus / Premium Security
1

After booting up, I double click on my Mozilla Firefox icon. A warning pops up.

“Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.”

The strange thing about this is I didn’t start a Firefox process. So, I am unable to use Firefox.

Please advise.

Thanks.

P L

2

Can you try going into taskmanager/processes and if there is a Firefox process running “end it” and then retry.

3

I tried that already. There isn’t a “firefox.exe” process there.

4

What i think has happened is that you have overdone it with the clicking.Try right click and then open and if this does not work then reboot the computer.

5

I had similar problem a few weeks ago.I installed same version “over the top”
and that fixed it.I guess some file was corrupted or something.