From a command prompt, enter the following command:
“C:\Program Files\AVAST Software\Enterprise Administration\AmsTool.exe” /pwdreset
“C:\Program Files\AVAST Software\Enterprise Administration\AmsTool.exe” is the installation path to the file.
If you cannot find it, simply search for it from the Start menu, and when you’ve found it, right click it and go to properties. The fields target and location will provide the full path, though you will have to add the file name [Avast.Sbc.Service.exe] and the /pwdreset switch to the end.
Once that’s done, the AMS tool will appear, and an option will be available to reset the password.
Below is the example command: