Norton - Sonar Protection Error

a meesage comes up that says sonair protection is not working and my computer is at risk..I have norton 2011 installed on it,hope you can tell me some thing to take care of this...I dont even know what sonair protection is.thank you freda hicks

have you tried turning sonar protection off?

Turning off or turning on SONAR Protection
SONAR protects you against malicious code even before virus definitions are available through LiveUpdate. By default, SONAR Protection is turned on to proactively detect unknown security risks on your computer.

When you turn off SONAR Protection, you are prompted with a protection alert. This protection alert lets you specify the amount of time for which you want SONAR Protection to be turned off.

Note:
When Auto-Protect is turned off, SONAR Protection is also disabled. In this case, your computer is not protected against emerging threats.


To turn off or turn on SONAR Protection

1. In the Norton Internet Security main window, click Settings.

2. Under Real Time Protection, in the SONAR Protection row, do one of the following:

To turn off SONAR Protection, move the On/Off switch to the right to the Off position.

To turn on SONAR Protection, move the On/Off switch to the left to the On position.

3.In the Settings window, click Apply.

if that doesnt work, you should update to the latest version, i have 18.5.0.125