Norton 2010 failed to detect trojan

Hi all,

 

Been very happy with my Norton 2010 IS so far.

 

Unfortunately today, I ran a full system scan which came back clean. However, when I ran Malwarebytes, it detected trojan hiloti, which it says it successfully removed. I am now a bit worried, that even though I have Norton as my real time protection, I am still being exposed to viruses which manage to go undetected by it.

 

Also, do you think my PC is safe now malwarebytes claims to have removed the trojan, or should I still be concerned ?