Gedragsschild behavior shield

Avast Premier. Behavior Shield is every time off after a new start of the computer. Not protected. I reinstalled Avast Premier, same problem.

Gedragsschild staat telkens terug uit na elke opstart. Manueel terug aanzetten lukt. Maar na uitzetten van computer en terug aanzetten, hetzelfde probleem met de melding U bent kwetsbaar, sommige schilden zijn uitgeschakeld. Reeds opnieuw geïnstalleerd, gerepareerd en gewijzigd.

English in use here. Find your language here https://forum.avast.com/index.php?board=21.0

Avast Premier. Behavior Shield is every time off after a new start of the computer. Not protected. I reinstalled Avast Premier, same problem.

Perform a clean installation of the latest avast version and see if the problem is solved.

new clean installation, still the same problem

Did you use avastclear ?

Clean Install of Avast:
https://goo.gl/4Ptzkf

Still not ok. Behaviorshield is in position off. I can change it. But after a reboot it is off again

What OS/SP ?
What exact version of avast ?
Is there any other security (related) software installed ? (or was there)
Do you have fastboot enabled ?