how to disable automatic defender in windows vista?

how to disable automatic defender in windows vista?

Windows Defender real-time protection against malware continues
to run despite having Automatic operation disabled.
In actuality, this built-in malware protector from Microsoft is very
poor at protecting your computer from external threats. You are
much better off using a 3rd-party software program like XoftSpy for
total protection.
To disable follow his steps:-
.....
1. Click the Start button.
2. Type “services” into the Start Search box.
3. Find Windows Defender in the list of programs.
4. Double-click on Windows Defender.
5. Choose Tools from the top menu.
6. Select Options.
7. Uncheck Auto Start at the bottom of the window.
.