Im confused. The password that i entered in the setup is used where?
It is used for the service. Each service in Windows runs under an account. It is either the LocalSystem account -- a special account that has unlimited local rights but no access to the network - or a regular (local or domain) account.
The avast service should ideally run under an account that has both local administrative rights and reasonable access to network resources (to enable on-access scanning of network shares).
The account under which a service runs can be configured in the service's properties. That's why I wanted you to review the properties of the "avast antivirus" service and make sure the username/password pair is specified correctly there.
just to clarify, a single click on the avast icon in the quick start menu results in a failure
So you get an error message? Can you post what is says, exactly? (or a screen shot)?
Thanks
Vlk