How to Fix the "RPC Server is Unavailable" Error

The "RPC Server is Unavailable" error often appears in Windows operating systems, indicating that the Remote Procedure Call (RPC) cannot be completed. This issue can disrupt network connections, access to other devices, and network services. Here’s a guide to understanding the causes of this problem and effective methods to resolve it.

Causes of the "RPC Server is Unavailable" Error

  • RPC Service Failure: If services responsible for RPC are disabled or malfunctioning, it may trigger this error.
  • Network Issues: Incorrect network settings or issues with network devices may disrupt client-server communication.
  • Antivirus Software or Firewall: Certain antivirus programs or firewall settings may block RPC connections.
  • Incorrect Windows Service Settings: Improper configuration of required services can lead to RPC failures.

Methods to Resolve the RPC Error

1. Check the Status of RPC Services

For RPC to work properly, several essential services need to be running:

  1. Open the Task Manager by pressing Ctrl + Shift + Esc.
  2. Go to the Services tab and look for the following services:
    • Remote Procedure Call (RPC)
    • DCOM Server Process Launcher
    • RPC Endpoint Mapper
  3. Ensure each of these services is set to "Running." If any are stopped, right-click on the service and select "Start."

2. Check Network Settings

Misconfigured network settings can interfere with RPC functionality:

  1. Open Control Panel and go to Network and Internet —> Network and Sharing Center.
  2. Select your active connection and click on Properties.
  3. Ensure that Internet Protocol Version 4 (TCP/IPv4) is enabled.

3. Disable Firewall or Antivirus Temporarily

Some antivirus programs or firewall settings may block RPC communication:

  1. Open Control Panel —> System and Security —> Windows Defender Firewall.
  2. Select Turn Windows Defender Firewall on or off, temporarily disable the firewall, and check if the error is resolved.
  3. If the issue is resolved, consider adding RPC as an exception in your antivirus or firewall settings.

4. Restore System Files

Corrupted system files can also cause RPC errors. To repair them, run the following command:

sfc /scannow

Type this command into Command Prompt (opened as Administrator). This process may take some time, and the system will attempt to repair any corrupted files found.

5. Restart Your Computer

Sometimes, a simple restart can resolve issues caused by temporary service or process glitches.