After the Symantec Endpoint Protection (SEP) 14 client is installed on Windows 10 (1703 Creators Update), Microsoft Windows Defender Security Center reports that the firewall feature has been deactivated.
This occurs even though the SEP Firewall is installed and is functional.
"Firewall is deactivated" is seen in Windows Defender Security Center.
Microsoft Windows Defender is causing this issue.
Windows 10 Creators Update (1703)
Disable Windows Defender to suppress this notification.
gpedit.msc, and then press Enter.
regedit.exe, and then press Enter.
DisableAntiSpyware, and press Enter.