Occasional Hits and Misses in NIS 2009 - Opinion?

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Greetings...

 

I have been an avid user of NIS 2009 for some time now.

 

However, I also have on my systems, other security software such as Malwarebytes and SuperAntiSpyware. I usually run full scans every other day and have noticed that NIS, on occasion, does not pick up certain threats, but the others do.

 

This raises a question... how does Symantec know about certain threats and the others don't and vice-versa?

  

Only by having these softwares run together (not at the same time though) do I have a better "sense" of security.

 

Thanks.

 

SN :smileysurprised:

 

Message Edited by Smart_Neuron on 06-13-2009 11:03 PM