Making a right click onto Norton Security tray icon brings up a pop-up window with three options:
- Turn on Silent Mode
- Disable Smart Firewall
- Disable Auto-Protect
Each of these can be used to prevent Norton Security from interfering with any of your tasks.
In Advanced Settings, you can also turn ON and OFF many of the Norton Security’s real time protection features.
source : http://www.nortonsecurityonline.com/faq/art/how-to-temporarily-disable-norton-security/