Since the last update to Firefox I am getting a 'Firefox is already running but not responding error message'. This is happening on my Win10 machine - my Win7 box is not… (read more)
Since the last update to Firefox I am getting a 'Firefox is already running but not responding error message'. This is happening on my Win10 machine - my Win7 box is not having any issues since the update.
I have followed the advice of creating new profiles, checking for locked profiles (and being unable to remove the lock?). I have completely removed Firefox from my system - uninstalled via control panel, deleted all folders in Program Files and Users etc, removed temp files and edited the registry to completely remove any Mozilla/Firefox entries. Completely clean install - as far as I can tell - but the problem re-appears as soon as Firefox is reinstalled. I've tried all this in WIn10 safe mode as well but still no joy.
The issue seems to be that there is a process running that cannot be terminated but I'm unable to kill the single remaining Firefox.exe process listed in task manager. When I try 'taskkilll /IM firefox.exe /F' from the command prompt I get an error that the process can't be killed as an instance of it does not exist. If I try 'taskkill /IM firefox.exe /T /F' it advises that a child process is keeping the main process alive - explorer.exe. Terminating explorer.exe does not free up the firefox.exe process for termination (same error of the instance not existing). The only way to clear the process is to reboot my system, Firefox will then start ok but when closed the issue will occur again.
I'm on my 4th clean install and the issue persists, so any help or advice beyond what I've tried would be appreciated.