turning off defender:
You may disable Windows Defender in the Windows Registry as well. Basically, it is the same setting that gets written to it when you disable the application in the Group Policy Editor.
Tap on the Windows-key to open the Start Menu.
Type regedit.exe and hit enter.
Confirm the UAC prompt to continue.
Navigate to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
If you see the preference DisableAntiSpyware on the right double-click on it and set it to 1 to disable Windows Defender.
If the preference does not exist, right-click on Windows Defender and select New > Dword (32-bit) Value, and name it DisableAntiSpyware.
To restore Windows Defender at a later point in time, delete the key or set its value to 0.
stopping updates:
Download and run the “Show or hide updates” troubleshooter for Windows 10 from Microsoft. https://support.microsoft.com/en-us/kb/3073930?utm_source=twitter
When you run this troubleshooter, it will search for available updates and allow you to “hide” them, preventing Windows from automatically installing them. In the future, you can run this troubleshooter again and unhide the updates when you want to install them.