Cleared a Trojan (APP_installer_ver_FDTVSV.exe) that I think I got from Harbor Freight scam. Norton History showed a lot of activity with Firewall rule changes even after I used Eraser. When I went to Firewall to check status noticed that the 'Apply' button was grey and I was unable to make any changes. Turned off Norton and Computer but nothing changed. Just got another 'loyalty' eMail from a business that I don't even frequent, so I know Firewall not working even though Norton says everything is fine. I really need help to reactivate my Smart Firewall; afraid to use any passwords for fear of giving away more personal data.