Avast Safe Zone Browser does not work

Hi:

Every time I try and open the Safe Zone Browser from Desktop Icon, I get message that" The Process Virtualization Feature will be activated upon reboot of the system> Do you want to reboot now". I have rebooted and restarted a zillion times and it still does not work. Any assistance will be greatly appreciated.
Anna W.

What OS/SP?
What exact version of avast do you have?