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my Firefox icon has changed to one I have never seen before and it keeps asking me to reboot and won't come up

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I was on Firefox earlier and it was OK. I went to go back on and got a message " your computer needs to be restarted to complete a previous upgrade of Firefox. Do you want to reboot now?". After rebooting I get the same message when I start it up. I also get this message when I try to uninstall the program

I was on Firefox earlier and it was OK. I went to go back on and got a message " your computer needs to be restarted to complete a previous upgrade of Firefox. Do you want to reboot now?". After rebooting I get the same message when I start it up. I also get this message when I try to uninstall the program

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Try to run the Firefox program once as Administrator (right-click: Run as Administrator).