Windows 10: Windows Defender missing

Hey, A month ago I bought a new laptop that came with pre-installed 60-day antivirus softwareNorton security. But now that software is missing. I don't know what happened but it's missing. But the worse thing is my windows defender is also gone.... I don't know how does this happen but I'm sure I didn't mess up with the security settings. Note I recently upgrade my windows 1909 to 20h2. Here are some screenshots of windows security. There are no options with the windows security page it's just a blank page......I can't even update windows. Please help me with this

:)

 

windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Why did the startup window get cleared?

I didn't missed any step, the list was gone and gone , even after using lot of programs the programs were not listed in that list.

 

Windows Defender Missing

Hey there, just noticed i missing windows defender?

What happened?

• Used to have malwarebytes installed, but removed it. Decided to rely only on microsoft and their defender/security intelligence features.
• Also have installed iObit Uninstaller and it reports too there is no antivirus installed on my laptop.
• Cant find windows defender folder in registry. Watched few online solutions of how to find and see if defender running or is up-to-date and all videos had files in registry editor -> windows defender folder, as you can see in screen shot I dont
• Cant find in Local group policy editor too. Microsoft Defender Antivirus folder present but also no Windows Defender folder

Whats going on? Where is my defender lol. I run win10 pro for workstations.

Freaking windows yo, but used to him.
Kindly let me know guys
Thanks