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    BlogTroubleshoot Windows Error: The RPC Server is Unavailable

    Troubleshoot Windows Error: The RPC Server is Unavailable

    Simon Brown • Dec 21, 2023
    Simon BrownDec 21, 2023
    8min read

    RPC (Remote Procedure Call) protocol enables communication between processes on different systems, which allows them to execute commands and exchange data. However, you may have faced the "The RPC Server is Unavailable" error due to connectivity issues. It could be due to misconfigured network settings, or your Windows security might be at fault.

    In any case, you need to resolve the error for a smooth remote connection. This article will highlight some of the common reasons for the RPC server not available issue and their effective fixes. Also, you will know the easiest method to control systems remotely if you read this guide until the end.

    Part 1. What is RPC and How Does it Lead to Errors?

    RPC, short for Remote Procedure Call, is a communication technology that utilizes inter-process communication. It is designed to facilitate communication between a server and a computer within the same network. RPC technology is employed whenever data is transmitted over the network using a Windows process.

    So, when thinking about what causes the "The RPC Server is Unavailable" error, we have discussed a few of the most common issues below:

    • Network Issues Causing RPC Errors: Network-related issues like disconnected cables or irregular connectivity problems can affect proper communication between client and server systems. Ultimately, this leads to the RPC unavailable problem in Windows.
    • Security Software Interference with RPC: Another factor can be interference from security software, like Windows firewall. It is often due to misconfigured settings that can hinder RPC communication by restricting necessary exchanges between the client and server.
    • DNS Problems and RPC Server Errors: Don’t overlook the incorrect DNS configurations or the failure to resolve the server's hostname. That’s because it can contribute to RPC Server errors, as the client will struggle to locate the server accurately.
    • RPC Service Not Running: Also, when the RPC protocol or its related services are not operational on either the client or server machine, it prevents the establishment of RPC communication properly.

    Part 2. 5 Proven Solutions for “The RPC Server is Unavailable” Error in Windows

    This section will focus on fixing the mentioned error according to the reasons that we have discussed above. The troubleshooting process of the RPC Server, not available issue isn't complicated yet and involves effective methods to resolve the problem. Some of the methods are discussed below, along with a bonus tip that will assist you in resolving the error with advanced and quick methods.

    Method 1. Restart the RPC Server

    A universal solution to many Windows-related issues is restarting the server or device. Also, it is often an effective initial step before exploring more complex fixes. This action will prompt Windows to re-establish all connections and restart all processes. Let’s discuss how you can restart your server to reconnect the RPC protocol:

    Step 1: First of all, you need to access the “Start” menu and type "Services" in the search bar. Now, as the option appears, right-click on it and choose the “Run as administrator” option from the drop-down.


    Step 2: In the next step, you will have to locate the "DCOM Server Process Launcher" option under the “Name” tab and select it by double-clicking. Then, you need to make sure that the "Startup type" is set to Automatic and the "Service status" shows as “Running.”


    Step 3: Click on the "Start" button under the "Service status" section if you notice any inconsistencies, as this action will restart the DCOM service.


    Method 2. Check Network Connection Settings

    The second method includes ensuring that all network cables are appropriately connected and free from any physical impairment. Also, it’s essential to verify the accuracy of network settings, including IP configuration or gateway settings. Other than that, you can use various diagnostic tools to diagnose the connectivity between the client and server.

    You can enable IPv6 and file and printer sharing on your network to resolve the issue properly. Here are the steps to enable these settings to resolve “the RPC Server is Unavailable” error:

    Step 1: First, you have to locate and open the network connections setting by pressing the “Windows + R” keys to open the Run dialog box. Now, within this dialog box, type "ncpa.cpl" and press the “Enter” key on the keyboard or click the "OK" button.


    Step 2: After that, you need to right-click your network connection and select the "Properties" option. A new window will open up, where you have to check the boxes for the File and Printer Sharing for Microsoft Networks” and “Internet Protocol Version 6 (TCP/IPv6)” options under the "Networking" tab. Next, press the “OK” button and head to restart your PC and check if the issue is resolved.


    Method 3. Change Firewall Settings

    Occasionally, the Windows Firewall can obstruct RPC server traffic, which leads to the RPC Server is Unavailable issue. That's why configuring its settings is important for smooth communication between devices. It is fundamental to ensure that the firewall grants access to specific ports and applications, including RPC. Stick to the steps elaborated below to change and manage firewall settings accordingly:

    Step 1: Begin the process by searching "Firewall & Network Protection” in the search bar at the bottom left. Then, open the right option as it appears in the search results. Now, locate and hit the "Allow an app through firewall" option.


    Step 2: Following that, you will have to find the "Remote Assistance" feature within the "Allowed apps and features" list. Ensure that its Public and Private boxes are checked. If not, tap the "Change Settings" button and check both boxes. Lastly, hit the "OK" button and restart your PC to check if the issue has been resolved.


    Method 4. Check Registry Settings

    The important configurations that significantly influence system operations lie in the Windows Registry. The “RPC Server is Unavailable Windows” issue can be resolved by reviewing and adjusting particular Registry settings related to Remote Procedure Calls.

    However, it is highly recommended to create a restore point and back up your registry before implementing the method. Here is how to check registry settings to resolve the RPC connectivity problem:

    Step 1: To start, you will need to press the Windows + R keys to launch the “Run” dialog box and type regeditin the search bar. Afterward, either hit the “Enter key to launch the Registry Editor or simply press the “OK” button.


    Step 2: You have to secure your registry by navigating to "File" and selecting "Export…" to create a backup copy on your system at the desired location. Here, backup is necessary; otherwise, the changes in the registry settings can seriously damage your Windows installation.


    Step 3: Subsequently, you can continue by navigating the following path within the Registry Editor:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\RpcSs.” Then, double-click on the "Start" entry and set the "Value Data" to 2” and the "OK" button.


    Step 4: Now, you have to repeat the process for the following two paths and set the "Value data" to 2 within the "Start" value.

    1. “HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\DcomLaunch


    2. “HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\RpcEptMapper


    Method 5. Flush and Renew DNS

    If no issues were identified within the Windows Registry, consider flushing your DNS. This process includes clearing the DNS cache and obtaining a new IP address. This action often restores effective communication between the client and server. You can follow the steps below using the Command Prompt to execute these actions:

    Step 1: To begin, you need to open the “Command Prompt," and run it as an administrator program. Following this, proceed with the “ipconfig /flushdns” command to flush the DNS cache quickly.


    Step 2: Now, if you want to renew the IP address, you need to enter the “ipconfig /renew" command and hit the "Enter" key.


    Bonus Tip: An Easier Way to Connect PCs Remotely

    These were some effective steps to clear the RPC server not available problem. However, it is recommended to use third-party remote desktop software to bypass all these complexities related to RDP.

    Avica Remote Desktop stands out as the perfect software to assist you in the smooth and secure usage of a remote desktop. This tool provides a secure connection with AES-256 encryption and ensures safe access to your devices with its powerful security features. Additionally, it does not compromise privacy and restricts the visibility of screens accessed remotely via privacy mode. The software facilitates swift file transfers through its proprietary protocol and provides an intuitive chat feature for seamless communication.

    Key Features Marking Avica’s Greatness

    • Multi-Monitor Support: Boosts productivity and offers enhanced customization options for improved workflow management.
    • Virtual Screen: Establishes additional workspaces within a single remotely-controlled display through the virtual screen feature.
    • Clipboard Feature: This enables the convenient transfer of information between remotely connected screens through the copy-and-paste feature, ultimately saving time and reducing effort.
    • Voice Sync: Avica's Voice Sync feature showcases the software's innovation, allowing users to effortlessly communicate by transmitting audio from a local PC to a remote PC.

    Step-by-Step Guide to Use Avica Remote Desktop Software for Remote Connection

    Feel free to easily download Avica software by clicking the button below. If you require additional information about Avica product downloads, please visit the dedicated Avica download page. Rest assured, Avica guarantees safety and ensures that all products acquired from their official website or app store are free from viruses. You can confidently download Avica from these trusted sources.

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    You can follow the below stated steps to use Avica tool:

    Step 1: Download and Install the Avica on your Windows

    Begin by installing and activating the Avica software on your computers. Then, “Sign In” using your Avica account details like “Email” and “Password.”


    Step 2: Find the Avica ID and Password Details of the Remote Device

    Now, you need to retrieve the "Avica ID" and "Password" for the remote device you intend to control. You can activate the remote access by toggling the "Allow remote access to this device via your credentials" switch on. Then you need to navigate to the “Remote Session” section of the local device, input the remote device's "Avica ID," and click the "Connect" button to start the remote session. Then, enter the corresponding "Password" when prompted. The connection will be established, which will enable you to control the remote desktop.


    Step 3: Explore the Remote Desktop Interface and Various Avica Features

    You will get to see the interface of Avica software, which will include the display of the remote desktop. Try out multiple features present in the top toolbar, such as "Chat," "Privacy Mode," "Voice Sync," “Screen Recording,” “File Transfer,” and more.


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    In a nutshell, multiple fixes can be tried out to resolve the "The RPC Server is Unavailable" error on Windows. Each method has its benefits, although some of them include complicated steps. However, Avica Remote Desktop software provides a user-friendly and safe platform for remote desktop features.

    Also, Avica will keep you out of all the RPC server or RDP-related problems. Moreover, it provides various other features to enhance your remote computing experience. If you are looking to resolve issues securely, then this tool has a high end-to-end encryption level.

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