Ok, Here's what I did. When you right click the Windows Defender folder click on Permissions. Then click the Advanced button. At the top of the Advanced security settings it says Owner: click change. Then where is says "Enter the object name to select" type in "Users". Click ok. Then Ok again. Now you should be able to check off the full control box for Everyone.
Thank you sir. That worked!
Was there any major improvement after disabling the W defender ?