Did you change the Avast settings from default? Are you doing a Custom scan?
Yes almost all of the avast settings are changed for maximum protection(except to test whole file and all type of packers from the real time file shield...that will overkill)
I'm using the "Scan from Windows Explorer" and that option is set to
Scan - Scan All Files
Sensitivity - High,code emulation,test the whole file,pup,follow links
Packers - All Packers
Actions - All actions are set to Repair=>Move to Chest=>No Action
Performance - Scan Priority set to High and both options below disabled
And nothing is excluded.
As you can see,there is nothing else that can be enabled for even better scan.
The boot time scan is set to scan all drives,high sensitivity,scan for pup and to unpack archives.
After all that,still nothing but the sandbox continue to suspect my programs