NIS 2010 using high amount of CPU

Hi all,

 

I have a question regarding the normal amount of CPU usage for NIS 2010.  On my desktop, my NIS 2010 can sometimes use up to 80% of my CPU (average was above 50%) during a full system scan.  I don't ever recall my NIS 2010 using this much of my CPU.  In fact, in my similarly specced laptop it runs much lower (about 20% average) for a full system scan.

 

My desktop's specs:

 

2.4GHz Core 2

4GB RAM

1TB HDD (7200 RPM)

 

Could there be a possibility that something might have compromised my NIS?  This system just had a fresh reformat a month ago.  I just had a few games installed and am using only about 50-60GB of my HDD.