When encountering the "RPC server is unavailable" problem, first confirm whether it is a local service exception or a network configuration problem. 1. Check and start the RPC service to ensure that its startup type is automatic. If it cannot be started, check the event log; 2. Troubleshoot network connection and firewall settings, test shutdown of the firewall, check DNS resolution and network connectivity; 3. Run the sfc /scannow and DISM commands to repair the system files; 4. Check the status of the group policy and domain controller in the domain environment, and contact the IT department to assist in handling. Gradually check it in sequence to locate and solve the problem.

When encountering the problem of "RPC server is unavailable", especially in Windows systems, many people's first reaction is that there is a big problem in the system. In fact, although this error sounds scary, many times it is just that some services are not running or that the network configuration is a little problem. The key to the solution is to figure out who called the RPC service and why it cannot be connected.

Let’s start with several common scenarios and talk about how to troubleshoot and repair them.

1. Check whether the remote procedure call (RPC) service is running normally

RPC is one of the core services of Windows, and many other services rely on it. This prompt may appear if the service is accidentally stopped or set to start manually.

Operation steps:

• Press Win R and enter services.msc to enter.
• Find the Remote Procedure Call (RPC) service in the list.
• Confirm that its status is "Running". If not, right-click and select "Start".
• At the same time, check whether its startup type is "automatic". If not, change it to automatically prevent problems from happening next time.

If you find that this service cannot be started, it may be because there is a problem with the dependency. You can further check the logs in the event viewer to see if there are any related errors.

2. RPC caused by network connection or firewall is not available

This error also often occurs in LAN environments, such as when you try to access another computer's shared files, printer, or use remote management tools.

Possible reasons include:

• The firewall blocks the ports required by the RPC (usually dynamically allocated, but may also be fixed on port 135)
• The network connection is unstable, or the target computer does not enable the necessary services
• There is a problem with DNS resolution, resulting in the target host not being found

Suggested practices:

• Temporarily close the firewall of the local or remote host to test whether the problem can still be reproduced
• Check network connectivity and DNS resolution using ping or nslookup
• If it is an enterprise environment, contact the IT department to confirm whether there is a policy to limit RPC communications

3. System file is corrupted or updated failed

Sometimes Windows update failure and system files corruption can also lead to abnormal RPC-related functions. At this time, you can try to restore system integrity through the system's own repair tool.

Operation suggestions:

• Open a command prompt (administrator permissions), and then run the following commands:

   sfc /scannow

  If no problems are found in this step, continue running:

   DISM /Online /Cleanup-Image /RestoreHealth

These two commands are used to scan and repair system files and repair Windows images respectively. After completion, restart the computer to see if the problem is solved.

4. Domain Controller or Group Policy Impact (Applicable to Company or School Networks)

If you are experiencing this problem on a company or school network, it may be that the domain policy forces some services to be shut down, or the domain controller itself is faulty.

The following points can be noted:

• Check whether you can join the domain normally, or an exception occurs when logging in
• Use gpresult /H report.html to generate a Group Policy Application Report to see if there are any conflicting items
• Contact the network administrator to confirm whether there are any server-side problems

Basically, these common reasons and ways to deal with them. Although the problem is small, if you are not familiar with the system service mechanism, it is indeed easy to get stuck. The key is to first determine whether it is a local problem or a network/server problem, and then gradually check the corresponding links.

The above is the detailed content of The RPC server is unavailable Windows. For more information, please follow other related articles on the PHP Chinese website!