If you don’t already have Avast Version 6.0.1091:
Free: http://files.avast.com/iavs5x/setup_av_free.exe installed, this may help with ZA issues.

However there have been many ZA FW issues in the past. So it is up to you what you want to do, and confirm which version of Avast you actually have installed on your machine once you return home. If you have the version stated above and still have issues, then I would recommend that you try one of the other FW’s stated in this thread as a trial first. Make sure you uninstall ZA per the vendors uninstaller tool and reboot your machine first prior to installing the new FW.

Let us know if you have any questions. Thank you.