Trust level%?

I know that this may sound like a stupid question but what is the Trust level% figure (under CPU USAGE) on the main screen supposed to show or indicate? I don't think mine has ever moved from 0!

I know that this may sound like a stupid question but what is the Trust level% figure (under CPU USAGE) on the main screen supposed to show or indicate? I don't think mine has ever moved from 0!

Thanks for the reply - I have my NIS2013 set on full scan so my trust Level% will be 0.

 

Thanks again!