So... yeah.
Stopped the iphlpsvc from restarting after reboot and already rebooted some times and until now it's everything running OK and smoothly.
Resource Display it's really useful cause shows how many amount of CPU every service is spending, so i find very easy to solve the problem (iphlpsvc it's not essential for the good work of the System, as far i know).
Anyways, a big thanks for everyone who tried to solve this annoying problem.
Ok... So... i'll keep come here to keep update with this nice and friendly avast! community.
All for now,
Silk0