Windows Defender girlfriend?

I just set up my friend's (HP) laptop.

Now it was Windows Defender's turn, but it looks completely different here than on other computers. (See image).

There's no "Virus & threat protection" rubric.

How do i fix this? (Operating system is Windows 10 2004)

Was removed with the last update, functionality is still included.

The Defender is maintenance-free. What do you want to try?

But with my laptop and PC there's…

And in the settings it says "Windows Defender is disabled"

Have you ever updated your PC?

Yes, it's up to date… But I'll set it up again, it's very simple.

Because that was turned on in Dark Mode. Something like that works with me too.

What does that have to do with the problem?

The security area was probably deactivated / hidden via the registry.