When an error "RPC server is not available" occurs, it is usually caused by network or service abnormalities. The solution is as follows: 1. Check whether the network connection and target device are online, and confirm whether the RPC service and related services (DCOM Server Process Launcher, RPC Endpoint Mapper) are running; 2. Restart the RPC service, if it cannot be started, set it to automatic and try safe mode operation; 3. Turn off the firewall or security software, confirm whether RPC communication is blocked and the corresponding rules are configured; 4. Run the sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth commands to repair the system files; most cases can be solved through the above steps. If there are still problems, further troubleshooting the system log or contact technical support.
When the error "RPC Server Unavailable" appears, it is usually a problem with the Windows system trying to communicate with other devices or services. This problem may occur during remote connections, network sharing, system updates, and even during certain software operation. Solving it is not always complicated, but requires step-by-step investigation of key points.

Below are some common causes and corresponding solutions to help you quickly locate problems.
Check network connections and service status
The RPC (Remote Procedure Call) service depends on network communication, so first you need to confirm whether the network is normal.

- If it is a local LAN operation, check whether the target device is online and whether it can ping.
- If it is a remote server, confirm that the IP address or domain name is correct and whether the target port is open.
- Run
services.msc
on the machine to see if the Remote Procedure Call (RPC) service is running. If it is not running, right-click to start it.
In addition, you can also check whether the following related services are operating normally:
- DCOM Server Process Launcher
- RPC Endpoint Mapper
Restart RPC service
Sometimes the service itself may be stuck or the configuration is abnormal, and restarting can often solve the problem.

- Press
Win R
and enterservices.msc
to enter. - Find the Remote Procedure Call (RPC) service.
- Right-click to select “Restart”.
- If the service fails to start, try setting the startup type to "Auto" and restart again.
If an error still reports after restarting, you can try to enter safe mode and operate again to eliminate interference from other software.
Check firewalls and security software
Firewalls or antivirus software sometimes block the communication ports required by the RPC, causing the connection to fail.
- Temporarily turn off the firewall or antivirus software to see if the problem disappears.
- If using an enterprise network, contact the IT department to confirm if there is a policy that restricts RPC communication.
- In the firewall settings, make sure Remote Procedure Call and DCOM related rules are allowed.
Check system file integrity
System file corruption may also cause RPC service exceptions. It can be checked and repaired through the system's own tools.
-
Open a command prompt (administrator permissions) and enter the following command:
sfc /scannow
Wait for the scan to complete, if there are any corrupt files, they will be automatically repaired.
If sfc does not find any problem, you can also run:
DISM /Online /Cleanup-Image /RestoreHealth
These two commands can fix most system component issues, including those that affect RPC.
Basically these are the methods. You can try step by step according to your situation, and in most cases you can solve it by restarting the service or checking the network. If the problem remains the same, it may be a more complex system or network configuration problem. It is recommended to check the system log or contact technical support further.
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