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Firefox: The program must close to allow a previous installation attempt to complete

I was running Firefox under a limited user account, and got the "critical updates needed" icon, which I foolishly pressed. Then I find out it can't install unless I'm an admin, so I log back in as admin, finish the install, and it won't run. Instead Firefox will say "The program must close to allow a previous installation attempt to complete" and then shutdown.

Various combinations of uninstalling firefox, rebooting, cleaning firefox keys from the registry, rebooting, reinstalling firefox still result in the error message "The program must close to allow a previous installation to complete".

Answer:

Remove the restrictions from that account and try then again (uninstall, fresh install) That worked for me. I had a similar situation where 2 Windows installations shared one machine.


Generated 0:02:42 on Jul 22, 2017