AVAST update reconfigured internet access

Yesterday’s AVAST program update has reconfigured my internet access and I can no longer communicate with the server.
This problem occurred previously (2 weeks ago, before the AVAST update) when I attempted to remove a Scorpionsaver virus file, and I had to use system restore and leave that file alone. In this case, the system will not restore, and the change cannot be reversed.
So how do I reconfigure my internet access? Currently, it does not detect the server, and has changed my network from its previous name and setting to “Network 5”.