Privacy and Security Blocking Install

OP wrote " I have removed disconnected VPn and Norton software so I have nothing other than Mac settings determining when I can see the software from Norton to be actioned. "

This will include Norton Antivirus 

Once this type of software is installed and embedded into the computer  >> Third Party Norton Security Software

You can spend hours or days hunting down all the bits and pieces of this software and never really get it all off the computer 

Start Over from Scratch 

For Apple Silicon computer >> Use Disk Utility to erase a Mac with Apple silicon.

For Apple Intel computers >>   Use Disk Utility to erase an Intel-based Mac followed by How to reinstall macOS

Always make a Time Machine Backup  before  proceeding 

If going this route - I suggest Not using Startup Assist to migrate everything back.

This will probably Re-Introduce (Third Party Norton Security Software ) back into the Operating System 

Security. Built right in

Mac app security enhancements

The Built in Security  is all that is required to protect the computer.

Protecting against malware in macOS

In macOS 15 Sequoia, Apple has restructured the location for managing system extensions. To approve system software that doesn't appear in the usual settings, follow these steps:

1. Open System Settings:

• • Click on the Apple menu () in the top-left corner of your screen.
  • Select System Settings from the dropdown menu.

1. Navigate to Login Items & Extensions:

• • In the sidebar, click on General.
  • On the right, select Login Items & Extensions.

1. Manage Extensions:

• • Scroll down to the Extensions section.
  • Here, you'll find categories like Network Extensions, Finder Extensions, and others.
  • Click the information icon (ℹ️) next to the relevant category to view and manage its extensions.

1. Approve the Extension:

• • Locate the specific extension you wish to enable.
  • Toggle the switch to enable it.
  • You may be prompted to enter your administrator password or use Touch ID to authorize the change.

Hello,

Making an educated guess here - can you check the Full Disk Access and Files & Folders if you can find Netgear Armor?

Good luck!

You don't need any 3rd party security on a Mac.

If the software in question doesn't even know if it is installed or not, then it probably isn't going to be able to detect any malware.

Already enable it there, but issue still persists.