Performance of Norton Internet Security on Windows 7 with the latest patches disapointing

I was not impressed that 25% of my CPU is processing Norton Internet Security. What features can I turn off to lower this CPU usage???

Does anyone have any ideas about this? Obvioulsy I want virus scans from email and downloadloads as well as web page scans

It would be nice to get that cpu usage down.or I may have to find a better security solution.

This really is not acceptable!!!