Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Can not install Firefox. Error cites FF is running and must be closed but can't be found. How close?

BillCZ
BillCZ
more options

The installer says "'FF' is already running but is not responding. To open a new window, you must first close the existing 'FF' process, or restart your system." I have uninstalled it in all acocunts and there are no references to FF anywhere I can find, to include the Task Manager applications.

The installer says "'FF' is already running but is not responding. To open a new window, you must first close the existing 'FF' process, or restart your system." I have uninstalled it in all acocunts and there are no references to FF anywhere I can find, to include the Task Manager applications.

All Replies (1)

David McRitchie
David McRitchie
more options

After the download,

  1. bring up the download manager ("Ctrl+J") and start your installs. As soon as the install comes up,
  2. close Firefox with File > Exit or "Firefox" button > Exit. Give Firefox some time to close.
  3. If install does not proceed, terminate "firefox.exe" and "plugin-container.exe" from the "Processes" tab in the Windows Task Manager.
    • Windows 7 shortcut to the WTM is "Ctrl+Shift+Esc"
    • or on any Windows system from "Ctrl+Shift+Esc" then choose Windows Task Manager.
    • Make sure that "firefox.exe" is no longer running -- if it is still running then terminate it by selecting the use "End Process" button or from context menu, and do the same for "plugin-container.exe" if it is found there.
  4. proceed with the install.

Modified by David McRitchie