"Service Host: Local System" is intermittently using 30% of my cpu (windows 8.1)

Hello, Service Host is using 30% of my CPU and I have read other post about this topic but i havent been able to solve my problem

So here is a file with the xperf trace to see the cause:

https://www.dropbox.com/s/0c71x294w7bhyit/highCPUUsage.zip

thanks in advance