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firefox shut down camn't reinstall

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I made mistake of upgrading to windows 10 with a new computer which I should have not done. Microsoft does not like firefox. I keeps trying to crash it. It finally did it to today. It shut down I can't reinstall an upgrade. firefox states I can not activate it until I shut down the old version. I have tried everything including uninstalling it from the program files. I have the new version it installed but I can't activate it. where do I go from here?

I made mistake of upgrading to windows 10 with a new computer which I should have not done. Microsoft does not like firefox. I keeps trying to crash it. It finally did it to today. It shut down I can't reinstall an upgrade. firefox states I can not activate it until I shut down the old version. I have tried everything including uninstalling it from the program files. I have the new version it installed but I can't activate it. where do I go from here?

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Let’s do a full clean re-install;

Download Firefox For All languages And Systems {web link}

Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86)

Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove the profiles folder.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia