Norton causing high CPU usage lately

Lately since I re-installed windows, I installed norton again and it's been making my cpu % in task manager go up to like 90%-100% it has never done this before and i'm wondering, is it a setting or something I may have enabled?

 

My specs:

 

OS: Windows 8 Pro 64-bit

CPU: Intel core i7 2600K @ 3.4Ghz

RAM: 16 GB

 

It works perfectly on my other desktop which is: 

 

OS: Windows 8 Pro 64-bit

CPU: AMD a6-5400k @ 3.6Ghz

RAM: 6 GB

 

This computer