How to Solve Error Code 0x204 in Microsoft Remote Desktop

By
Issabela Garcia
-
0
14

Encountering an error while trying to use Microsoft Remote Desktop can be frustrating—especially when the error code doesn’t provide much context. One of the most common issues users face is Error Code 0x204. This error occurs when a connection attempt fails, usually due to a misconfigured setting or connectivity issue. Fortunately, it’s often solvable with some simple troubleshooting steps.

TL;DR (Too Long; Didn’t Read)

Error Code 0x204 in Microsoft Remote Desktop typically signals a failure to connect to the remote PC, often due to network settings, firewall configurations, or incorrect credentials. Checking IP addresses, enabling Remote Desktop on the host machine, and ensuring both devices are on the same network are effective first steps. Firewall exceptions and updates to Remote Desktop settings may also resolve the problem. Follow the full guide below to troubleshoot thoroughly.

Understanding Error Code 0x204

Error Code 0x204 is raised by Microsoft Remote Desktop when it cannot establish a connection to the remote host. The message may read:

“Remote Desktop can’t connect to the remote computer for one of these reasons…”

This error can stem from various issues including network configuration problems, the target PC not being set up to accept remote connections, DNS conflicts, or incompatibility between client and server versions of RDP (Remote Desktop Protocol).

Common Causes of Error Code 0x204

  • Remote Desktop not enabled on the target computer
  • Firewall restrictions on either end
  • IP address changes in dynamic network environments
  • Incorrect credentials or user permissions
  • Antivirus or third-party firewall programs blocking the connection
  • Outdated Remote Desktop client or Windows components

Step-by-Step Solutions to Fix Error Code 0x204

1. Check if Remote Desktop is Enabled

First, ensure that the target PC has Remote Desktop enabled. On Windows systems, follow these steps:

  1. Open Settings > System > Remote Desktop.
  2. Toggle Enable Remote Desktop to On.
  3. Note the PC name, which you will use to connect remotely.

Also make sure that the user account trying to connect is allowed access. Click on Select users that can remotely access this PC and add the appropriate user if needed.

2. Verify Network Connectivity

Make sure that both devices—host and client—are connected to the internet and preferably on the same LAN (Local Area Network) for initial troubleshooting. You can use the ping command to check basic connectivity:

ping [Target_IP_or_Hostname]

If ping fails, check routers, firewalls, and make sure the IP or hostname is correct.

3. Use the Correct IP Address or Hostname

Dynamic IP addresses can change, especially on reboots. Always:

  • Open cmd on the host and type ipconfig to check the current IP.
  • Use that IP address in Remote Desktop Client instead of a potentially outdated hostname.

4. Allow Remote Desktop through Windows Firewall

Windows Firewall often blocks RDP ports by default. To permit connections:

  1. Go to Control Panel > System and Security > Windows Defender Firewall.
  2. Click Allow an app or feature through Windows Defender Firewall.
  3. Check both Private and Public boxes for Remote Desktop.

Advanced users may also want to verify that port 3389 (the default for RDP) is open.

5. Disable Third-Party Antivirus or VPN Temporarily

Some antivirus programs or VPNs block Remote Desktop connections as a security feature. Disable them briefly to see if this resolves the issue. If so, consider adding Remote Desktop to their exception lists.

6. Update Remote Desktop Client and Windows

Compatibility issues between client and host systems may cause Error 0x204. Ensure both the Remote Desktop client and Windows OS are up-to-date:

  • Open Windows Update, then click Check for updates.
  • For Remote Desktop on macOS or Android, visit the respective app store and update.

7. Try a Different User Account

There may be a problem with the specific user profile trying to log in. Try to use another remote account to test if the configuration is at fault.

8. Modify Registry Settings (Advanced)

If the usual steps fail, making a registry fix might help—particularly with authentication issues. Proceed with caution and back up your registry:

  1. Open regedit via the Run dialog (Windows + R).
  2. Navigate to:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  3. Create a DWORD value called DisableRestrictedAdmin and set its value to 1.
  4. Restart your computer.

This changes how authentication is handled and can bypass certain restrictions.

Additional Tips

  • Use Remote Desktop Web Client as an alternative method if the desktop client fails.
  • Ensure that Network Level Authentication (NLA) is properly configured on both machines.
  • Check for Group Policy settings that may restrict RDP access in corporate environments.

Conclusion

Although Error Code 0x204 in Microsoft Remote Desktop can be tricky to diagnose, methodical troubleshooting often leads to a solution. Whether it’s a firewall rule, a network misconfiguration, or a settings mismatch, a little patience goes a long way. Always start with the basics—network check, firewall, Remote Desktop being enabled—before diving into advanced registry or policy edits.

FAQ: Solving Error Code 0x204 in Microsoft Remote Desktop

  • Q: What does Error Code 0x204 mean?
    A: It indicates that the Remote Desktop client could not connect to the target computer, likely due to network issues, firewall rules, or incorrect settings.
  • Q: How do I find the correct IP address to use in Remote Desktop?
    A: On the host computer, open Command Prompt and type ipconfig. Use the IPv4 Address shown under your current network adapter.
  • Q: Is Error 0x204 specific to Windows?
    A: No, it can appear in macOS, iOS, and Android versions of Microsoft Remote Desktop when trying to connect to a Windows machine.
  • Q: Can VPN services interfere with Remote Desktop?
    A: Yes, some VPN services can block RDP ports or reroute traffic that prevents proper connection. Temporarily disable the VPN to test.
  • Q: Does restarting help?
    A: Sometimes, a simple restart of either the host or client computer resolves networking issues and miscommunications in RDP handshake protocols.