I used a client to test deploy the v6 client to. On this client there was the 4.8 managed client installed.
The deployment went successful. No problems there.
Then i went checking the program files directory.
As expected there was the avast installation of the new v6 client. BUT i also saw the old directory of the Avast4 installation.
This is pollution, can the upgrade installer completely remove the directory please or get a message to the business console that upgrade succeeded but there is leftovers that need to be removed?
maybe you can uninstall it by GPO using msiexec /X{GUID} /QN? In case of a password to protect the program settings it could be a problem tough. I would recommend to unset the password using the old ADNM first.