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Smart Firewall turned itself off and is greyed out
After I upgraded to a larger hard drive, Norton Security (the current version) turned off its "smart firewall." "Enable smart firewall" is greyed out when you right click the Norton icon in the system tray. When I go into Norton's settings and click on "Firewall," everything is greyed out including the on/off switch. I cannot turn on Windows 10's Windows Defender Firewall.
I uninstalled Norton Security, rebooted and reinstalled. The Smart Firewall worked for two days and tonight it went "dead" again. And I cannot turn on Windows' own firewall.
I'm at a loss as to what might be causing this behavior -- again it started right after I upgraded to a larger hard drive (via cloning). I am singed in to Norton Security. My subscription is current. I'm running Windows 10 Pro (64-bit) fully updated.
Any insightful suggestions on how to remedy this problem would be most welcome. I don't like operating without a firewall. Thanks very much.