Disabling Avast Antivirus and Firewall Protection

To temporarily disable Avast antivirus and firewall protection on your computer due to an error in the Chart Installer program, do the following:

Right-click the Avast icon in the System Tray. This is located in the lower-right corner of the desktop. If you do not see the icon, click the arrow button at the edge of the System Tray to expand the Tray and display all the icons.
Navigate to "Settings", then under "Protection", toggle the slider for "Core Shields" to the left to disable virus protection.
Disable the firewall by accessing the "Firewall" section within the settings and choose to disable it, usually with a toggle switch, remembering to confirm your choice when prompted.
Confirm your choice by opening the Avast user interface. If it is red and says all antivirus shields are off you have disabled it.

Close the Chart Installer program and then reopen it to refresh the screen and proceed to start the download again.