Norton weak in detecting Adwares/Malwares?

Hello everyone

 

I been using NIS since long time and I really see it as the best AV software available in terms of the software performance or it's detection to any harmful files but honestly I am quiet disappointed lately because I been infected twice with malewares, and on both incidents I needed assistance from Malwarebytes to get rid of them. 

 

And since this is the second time I got caught with a maleware, I thought to save the report and ask about this, So here is the report I had from Malwarebytes.

 

I really was wondering, how could this little tiny free software detect what NIS can not?

 

P.S. Running the latest update of Windows 7, IE9 and NIS 2012.