There are several steps to follow if you want to disable Microsoft Security Essentials:
- Click the Start button, type "security" and click "Microsoft Security Essentials" or find the Security Essentials icon in your System Tray (usually represented by a little green house with a flag on top). Right-click it and choose 'Open'.
- Click the "Settings" tab and click "Real-Time Protection".
- Uncheck the box next to "Turn On Real-Time Protection".
- Click "Save Changes" and you're done.
Note: If you want to re-enable Microsoft Security Essentials, you should repeat the procedure and check the box next to "Turn On Real-Time Protection".