Techpository

There are a few methods, but home users have fewer options due to the lack of a policy editor.

1. Start “regedit” from the search or run line
2. Goto HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
3. Create a new 32bit Dword called DisableAntiSpyware
4. Press Enter
5. Modify the DWORD’s value data field to be a hex value of 1
6. Click OK

If you check your Windows Defender Settings in Settings, Update & Secruity, Windows Defender, you will now she it off and greyed out

By: Britec09