Tackled in this post is a Windows 10 error that reads “Avast rpc server unavailable.” Read on to learn what this error means, what causes it and how to fix it.

Then I tried to configure replication between the folder targets for one of the namespace folders, but the replication wizard wouldn’t start — it said something about “RPC Server unavailable ...

This error occurs when Windows Update is trying to communicate with the update servers but can’t establish a connection or the Remote Procedure Call (RPC) server is unavailable.

If you receive RPC server is unavailable message, then this post shows how to troubleshoot Remote Procedure Call failed errors & problems on Windows 11/10.