NS 2016 suddenly takes alot of CPU "power"

Hello.

For the 3:rd day in a row NS 2016 (Norton Security 2016) takes a lot of CPU power, somewhere between 70 - 75%.
i have done a malware scan with both MBAM & NS 2016 and neither found any malware at all.

i have posted three screen dumps with more than 30 min apart