There are 2 possible ways to disable Window Defender, You can choose either One.
Press Windows key + R
Run it as administrator
Paste the following command
NetSh Advfirewall set allprofiles state off
You should see "OK"
Now your firewall is disabled
Disable Windows Defender
Download the Defender control app
Extract it to your Desktop
Click on "Disable Windows Defender"
HERE IS the Video To Do It Manually!