Question regarding Sandbox & SafeZone in Avast Internet Security 2015

I have 2 questions that I hope someone can help me with:

(1) A root scan performed by ThreatFire flagged a hidden file within the Avast Sandbox as a high risk. Is there supposed to be a hidden file in the Sandbox? If so what does it do?

(2) Do you know of a detailed help page concerning the SafeZone? I cannot get it to work on either of my two computers.

Thank you for your time.

If so what does it do?
1. very difficult to answer since you dont give any file info or ThreatFire log ;)
  1. avast FAQ https://www.avast.com/en-eu/faq.php

FAQ videos https://www.avast.com/en-eu/faq.php?q=video#searchForm

Thank you for your prompt response!

In regards to my #1 question, I was just wondering if there is supposed to be a hidden file in the Sandbox.

I will check your links regarding SafeZone. Thanks again.

I read articles and SafeZone is still not working for me. I have Windows 7 and use latest version Firefox. Any suggestions?