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Already running programs that don't work and can't be turned off with win task manager

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When I start win10 I get an error message about FF or TB already have FF running but not responding. Neither program is on the startup menu. So neither program works.

When I start win10 I get an error message about FF or TB already have FF running but not responding. Neither program is on the startup menu. So neither program works.

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See:

You can try to delete parent.lock in the profile folder.

Location used for the main profile that keeps your personal data (Root Directory on about:profiles).

  • C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>

You can use the button on the "Help -> More Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

See "Visual Studio 2015, 2017 and 2019":


You can use the MSConfig program or the Autoruns utility to see what software is getting started (be cautious with disabling services).