The unavailable RPC Server error could mean that a printer is not available to the computer. The Unavailable printer issue could be a software issue and it can be fixed in a straight-forward manner. Before changing settings of services in the software, you should check the hardware. If the printers are connected correctly, the RPC server problem can be solved in not one, but two different ways. It is possible to manipulate the Printer Spooler service as well as of the RPC to fix the issue. Follow the steps below carefully, to solve the unavailable RPC server error and start printing documents.