I have a problem with Safe Zone as well.
After updating to Windows 10 the Safe Zone browser just shows an empty page and freezes.
Before the update Safe Zone was working fine. Already done a reset to original settings.
Any sugestions?
You should try a 'Repair' of your Avast installation.
Go to Control Panel/Programs&Features/Avast and click to Uninstall/Change.
When the Avast install options appear, scroll up/down and select "REPAIR"
When completes make sure to REBOOT
Any better.