The “RPC Server Is Unavailable” error in Windows can be frustrating, especially when it interrupts printing tasks, prevents access to network resources, or blocks essential system services. RPC, short for Remote Procedure Call, is a core Windows protocol that allows different processes and systems to communicate with one another. When it fails, depending applications fail too. The good news? In most cases, this error is fixable with straightforward troubleshooting steps.

TLDR: The “RPC Server Is Unavailable” error usually occurs due to disabled services, network issues, firewall interference, or corrupted system files. Start by checking essential services like RPC and DCOM, then inspect firewall settings and network configuration. Running system scans and updating drivers can also resolve the issue. Most users can fix the problem without reinstalling Windows.

What Causes the “RPC Server Is Unavailable” Error?

Before diving into solutions, it helps to understand the root causes. Common triggers include:

  • Disabled or stopped RPC-related services
  • Firewall blocking necessary communication ports
  • Network configuration errors
  • Corrupt system files
  • Outdated or faulty drivers
  • Problems with Domain Name System (DNS)

Because RPC supports many Windows functions, this error can appear while trying to:

  • Access shared folders
  • Connect to another computer
  • Use Windows Remote Management
  • Print documents
  • Open certain system utilities

Let’s go through 8 proven solutions that can help you restore proper functionality.

1. Ensure RPC Services Are Running

The most common cause of this error is that essential RPC services are disabled or stopped.

Steps:

  1. Press Windows + R, type services.msc, and press Enter.
  2. Locate the following services:
    • Remote Procedure Call (RPC)
    • DCOM Server Process Launcher
    • RPC Endpoint Mapper
  3. Make sure their status is Running and startup type is Automatic.

If any service is stopped, right-click it and select Start.

Tip: If you cannot start a service, there may be system corruption involved—skip ahead to Solution 6.

2. Restart the Computer

It sounds simple, but restarting your PC can resolve temporary RPC conflicts. Windows occasionally encounters service initialization failures after updates or software installations.

A full restart resets service dependencies and clears temporary memory-related issues.

3. Check Windows Firewall Settings

The Windows Firewall may block RPC communication, particularly in enterprise or domain environments.

To verify firewall settings:

  1. Open Control Panel
  2. Go to Windows Defender Firewall
  3. Click Allow an app or feature through Windows Defender Firewall
  4. Ensure:
    • Remote Assistance
    • Remote Service Management
    • File and Printer Sharing

    are allowed

If you’re on a corporate network, consult your IT administrator before making changes.

Important: Never disable your firewall permanently as a solution. If disabling it resolves the issue temporarily, create targeted exceptions instead.

4. Verify Network Connectivity

RPC relies heavily on proper network communication. A network problem between devices can trigger the error.

Run this command in Command Prompt:

ping hostname

If the ping fails, check:

  • Ethernet or Wi-Fi connection
  • IP configuration (type ipconfig /all)
  • DNS server settings

For persistent issues, reset your network stack:

netsh int ip reset
netsh winsock reset

Restart the computer after running these commands.

5. Enable IPv6

Some Windows systems rely on IPv6 for internal RPC communications. If it’s disabled, RPC may fail.

To enable IPv6:

  1. Open Network and Sharing Center
  2. Click your active connection
  3. Select Properties
  4. Ensure Internet Protocol Version 6 (TCP/IPv6) is checked

Even if your ISP doesn’t use IPv6, Windows networking components may require it.

6. Run System File Checker (SFC) and DISM

Corrupt or missing system files can break RPC functionality.

Run System File Checker:

sfc /scannow

Wait for the process to complete. If issues are found but not fixed, run:

DISM /Online /Cleanup-Image /RestoreHealth

These tools repair Windows system images and restore missing components.

Pro Tip: Always run Command Prompt as Administrator when performing these scans.

7. Update Device Drivers

Outdated network drivers are a surprisingly common cause of RPC failures.

To update drivers:

  1. Right-click Start
  2. Select Device Manager
  3. Expand Network Adapters
  4. Right-click your adapter and select Update driver

You should also check:

  • Chipset drivers
  • Motherboard firmware
  • Printer drivers (if RPC error occurs during printing)

Keeping drivers current ensures proper component communication.

8. Check Registry Settings (Advanced Users)

If RPC services refuse to start, there may be registry inconsistencies.

Warning: Editing the registry improperly can harm your system. Always create a backup first.

Press Windows + R, type regedit, and check:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RpcSs

Ensure:

  • Start value is set to 2 (Automatic)
  • ObjectName is set to NT AUTHORITY\NetworkService

If values differ significantly, this could explain service failure.

Quick Comparison Chart: Manual vs Automated Fix Methods

If you’re unsure which approach to try first, use this comparison:

Solution Difficulty Level Risk Level Best For
Restart Computer Very Easy None Temporary service glitches
Check RPC Services Easy Low Disabled services
Firewall Adjustment Moderate Low Blocked communication
Network Reset Commands Moderate Low Connectivity problems
SFC and DISM Moderate Low System corruption
Driver Update Moderate Low Hardware conflicts
Registry Editing Advanced Medium Persistent RPC failures

Additional Prevention Tips

Once you resolve the issue, follow these best practices to prevent it from returning:

  • Keep Windows updated regularly
  • Install driver updates from manufacturers
  • Avoid disabling essential services
  • Use reliable antivirus protection
  • Regularly run system scans

System stability relies heavily on background services functioning correctly. Maintaining them prevents recurring errors.

When to Consider a System Restore or Reset

If none of the above solutions work, consider:

  • System Restore to a previously working state
  • In-place repair upgrade of Windows
  • Full Windows reset (last resort)

These options are rarely necessary but can resolve deeply rooted corruption issues.

Final Thoughts

The “RPC Server Is Unavailable” error may look intimidating, but in most cases, it’s caused by something simple—like a stopped service or minor network misconfiguration. By systematically checking services, firewall settings, and network connectivity, you can usually restore full functionality within minutes.

Start with the easiest solutions first. Restart the system, verify essential services, and confirm firewall settings before moving to advanced tools like registry editing. With a structured approach, this error becomes manageable rather than mysterious.

Remember: RPC is foundational to Windows operations. When it fails, other services follow—but with the right troubleshooting steps, you can restore stability quickly and confidently.