Wi 10 Defender is off, and greyed out. Command Line does not work...

Greetings:

The next issue in Win 10 20H2 Build 19042.804 (The Problematic Version):
Out of the blue, today my system booted up with Defender TOTALLY turned off, and the "Force Turn On" command line in elevated CMD ... did nothing after reboot.

There's no third party AV or other, it worked "fine" (see other posts about Defender by me) yesterday.

I wanted to install (actually i DID) PDF reader, I expected the normal crap (program blocked despite signed, program blocked from writing, program not allowed to use folder this and that, ..., the usual issues I get, and are not addressed by MS)...

... no... NOITHING of the sorts.

Alarm bell.

Check Defen... AH CRAP.
All turned off, greyed out, no way to get it up again.

"Perform a restore", "Do a clean boot" and other ideas that would undo ALL up to the part that i have a base Windows intallation.

Now, if you understood the hell I've been through in the past month, almost now 2 months... I refuse to go through this all again.

I cannot enter Safe Mode for one, as, for whatever reason that Windows now does this, it totally fails to find my old keyboard: a LogitechK120, of of the MOST base keyboards out there.
Not even when I replug it into another USB.

In short:
I am looking for a FORCED activate command that does not undo all I've been through.

If I have to re-install Windows again, I will go homicidal...

I hope anyone can help me with my issue...

Thank you.
Xog.

Thank you both.

I wonder, why does my PC suddenly go entirely ape since 20h2?
I mean, yes I had issues before with File Explorer (over several versions and PC's) starting at I believe, Win XP, which has not been fixed, or other things that were annoying, or the "missing MSVCR and similar things, though installed and present, but what I run into lately is just...
Mindboggling to say the least...

Are these issues, version bound, or is there something else going on?

I've asked over SO many forums, but never I gotten a decent solution...

Thank you, both:
Xog

I will let you know if it, if at all, worked...
Seems my PC has gotten "The Ghost in the Machine" (Dr. Alfred Lanning, I Robot)...

- - - Updated - - -

Bat nor Reg file did any good.
Tried to add it manually, no result...

Going to dive deeper into the links given.

Funny, this:
Makes me wonder if I even still have Defender....

TairikuOkami said:

That is just the result of Security Center being disabled, usually done by privacy tools.

I know, sir.

I tried a ton of things now, nothing yet.
I even used a tool to make the RegEdit having FULL power, no use.

Continuing to search deeper...

dalchina said:

If you've used anything like that, they usually have a 'reset to default' option.

Yes, which would undo all I got so far, resetting my system to base windows installation.
Not going there AGAIN, sir...

dalchina said:

Have you used any utilities to tweak settings or disable telemetry, for example?

If you mean by hacks illegal things... NO!
Just to get this out of the way.

If you mean with hacks Win tweaks like setting up Taskbar for easy access to various tools, then yes, but that was now about 1 to 2 months ago.
Haven't done anything that is even remote to tweaking.

Unless if you take that blasted Defender acting up with it's constant annoyances: Yes, allow X to run, no, X is safe, YES, DAMMIT, X can use the darn #%$%@ Documents, YYYEEEESSSSSS I said it was OK to have it used the BLASTED Documents just a minute ago!!!!!!!! and more fun stuff.
EDIT: It was todays lack of frustration in that matter that warned me something was quite off...
The fact that Defender did not ruin my day as it used to, make me check Defender... :S

I did not install or use anything program altering stuff in the past week.
Yesterday my day was filled with my primary OCD (I am autistic, Aspergers, and I have this quite bad): MUSIC.
Been the whole day blasting music, cut of from reality...
Actually, the past three days were pure music.

Unless Youtube or VLC does "strange things" to one's PC then no, nothing out of the ordinary took place.

Yesterday I logged out, all was fine, Defender was still there (I even did a minor scan on C and checked for updates: nothing was out of the ordinary).
Today then, when i wanted to install Acrobat Reader, I noticed Defender not doing it's usual nonsense when I want to install or modify something (read first post).

So, I fear, lately there has been no Restore Point, and my backup with Acronis also dates back a while now, being that a backup of the first days...