This idea has originally been posted by @derekriemer in this NVDA-devel thread

We should let the user pick what add-ons they want to choose on the
logon screen, I.E. if I want Vocalizer, and have that, but don't want to
copy NVDA remote.

I propose the following procedure:

1. Go to general settings
2. Press "Use currently saved settings on the logon and other secure screens (requires administrator privileges)"
3. When pressed, show a new modal dialog with the following controls:
   • A list with enabled add-ons, which can be either checked or unchecked. It makes no sense to show disabled add-ons in this list
   • When one or more add-ons are marked for copying, show a checkbox, reading "I understand that copying add-ons to the system profile could be a security risk, and I still wish to copy them"
   • Ok and Cancel buttons
4. When pressing OK, copy the user settings to the system config, including only the add-ons marked for copying.