After installing the latest update of Windows 10, I keep getting errors that my computer needs to have virus protection and firewall turned on. When I select to turn on I am offered 2 choices: Windows Defender and Norton Internet Security. When I select NIS and click to start it, nothing happens. The same thing happens if I select Windows Defender. However, If I open NIS, it says "You are protected." Is there any way I can fix this?