Hi,
"The RPC server is unavailable" error can occur due to various reasons under different scenarios.
RPC stands for "Remote Procedure Call". RPC allows your computer to access a network. RPC has two main parts to it: the client and the server. When the
client (the program requesting something) sends a message to the server (the process that takes the order or performs the task), it is being asked to execute
a certain procedure. The client waits for the server to process the call before resuming the execution. Usually, the RPC error pops up because there is some sort
of miscommunication between the computer and the server. Most of the time, the wires get crossed somewhere due to Internet components that are not configured
or activated. Sometimes it is just a matter of adjusting the Internet Firewalls or Proxy Server.
If you are getting this error, then please provide us some details so that we can help you fix the problem.
Coming to your second question, IPC stands for Inter-Process Communication (IPC) share
It is a network share on computers running Microsoft Windows. This share is used to facilitate communication between processes and computers, often to exchange
authentication data between computers.
Regards,Afzal Taher - Microsoft Support.Visit our **Microsoft Answers Feedback Forum** and let us know what you think.