Hi all, let me inform you that we have fixed and released the microupdate for the problem when Windows AV is in passive mode and therefore main service + user interface are not starting. Once delivered to your machine (such emergency update is executed every 4hrs), you need to restart the machine.
You can alternatively execute the scheduled task (Avast Emergency Update) from Windows Scheduler, wait till it finishes and restart the machine.
Any feedback is highly appreciated. Thank you!