After you install the latest version of Avast and you try to run a backup from a batch file.
A dialog opens and scrolls saying "a backup or restore operation is in progress".
This is the workaround I used to resolve the problem.
Go toStart, Programs (All Programs), Utilities
Locatethe shortcut to Macrium “Reflect”.
Rightclick on it andselect “Properties”
Locatethe “Compatibility”Tab and select it
Clickon “Changesettings for all users at the bottom”
At thebottom of the “Compatibility for all users” tab Check “Run thisprogram as an administrator”
Clickon Okay again.
If youreceive a security warning accept the change.