Disable automatic window update proper

1. Open control panel.
2. Click on System.
3. Click on the automatic updates tab.
4. Select Turn off automatic updating.
5. Click Ok.

OR 

1. Go into Control Panel > Administrative Tools > Services.
2. Highlight the service called "Automatic Updates". You will know when you have the correct one because you will see a description about it telling you what it does.
3. Right click once highlighted and click stop to terminate the service.
4. Right click on it again and go to Properties. Half way down the first tab there is "Startup Type:" change this to disabled.