Remote Desktop Protocol (RDP) is a powerful tool for accessing remote systems. However, like any technology, RDP connections can sometimes encounter errors that prevent you from accessing your remote desktop. Whether you are an IT professional or a beginner, understanding common RDP connection errors and their solutions can help ensure smoother and more efficient access to your systems.

Common RDP Connection Errors and Solutions

When working with RDP, users may experience a variety of connection issues. Below are some of the most common RDP errors and simple solutions to fix them.

Remote Desktop Can’t Connect to the Remote Computer

Error Message: "Remote Desktop can’t connect to the remote computer for one of these reasons: The remote computer is turned off, the remote computer is not available on the network, or the remote computer is not configured to allow remote connections."

Possible Causes:

• The remote computer is powered off or in sleep mode.

• The RDP service is disabled or not running.

• Firewall or network issues.

Solution:

• Ensure that the remote machine is powered on and connected to the network.

• Check if RDP is enabled on the remote machine by following the steps in the previous article on setting up RDP.

• Confirm that the Remote Desktop feature is active in the system’s Control Panel > System and Security > System > Remote Settings.

• If using a VPN, ensure the VPN connection is active.

• Check for firewall settings that might be blocking port 3389 (default RDP port).

The Remote Desktop Session Has Ended

Error Message: "The remote session was disconnected because of a network error."

Possible Causes:

• The remote computer’s network connection is unstable.

• The remote desktop session is timing out or encountering a configuration issue.

Solution:

• Verify that both the local and remote systems have stable internet connections.

• If using Wi-Fi, try switching to a wired connection to reduce interruptions.

• Disable network timeouts in RDP settings:

  • Open Remote Desktop Connection.

  • Click on Show Options and then go to the Experience tab.

  • Uncheck "Persistent bitmap caching" and "Reconnect if connection is lost".

Your Credentials Did Not Work

Error Message: "Your credentials did not work. Please try again."

Possible Causes:

• Incorrect login credentials.

• Network issues that cause authentication failure.

• Locked or expired user accounts.

Solution:

• Double-check the username and password being used to ensure accuracy.

• If you're unsure of the login credentials, verify them by logging into the remote machine directly.

• Ensure the user account has proper permissions to access the remote desktop.

• If you're connecting from a domain, make sure to use the full domain format: domain\username.

RDP Session Freezes or Disconnects Frequently

Error Message: No error message – the session freezes or disconnects without notice.

Possible Causes:

• High network latency or bandwidth issues.

• RDP server resource limitations.

• Corrupted RDP configuration settings.

Solution:

• Ensure a stable and high-speed internet connection on both ends. Switch from Wi-Fi to Ethernet if possible for better stability.

• Check if the remote machine is under heavy load (CPU or memory usage). Try freeing up resources or upgrading the VPS/server.

• Reset RDP settings or try creating a new RDP session with default settings.

• Use the "Low bandwidth" option in the Experience tab to optimize the connection for slower networks.

License Limit Exceeded Error

Error Message: "The remote session was denied because the license store has expired or the maximum number of connections has been reached."

Possible Causes:

• The RDP licensing server has expired or is misconfigured.

• There are too many concurrent RDP sessions allowed on the machine.

Solution:

• Check the Remote Desktop Licensing Manager for expired or invalid licenses. Renew or reconfigure as necessary.

• Reduce the number of concurrent connections to allow new users to connect.

• For Windows Server, ensure that the RDS CALs (Client Access Licenses) are configured properly.

Unable to Connect Due to Firewall Settings

Error Message: "Remote Desktop can’t connect to the remote computer."

Possible Causes:

• Firewall settings on the remote or local machine are blocking the RDP port (3389).

Solution:

• Ensure the firewall allows inbound connections to port 3389 (default RDP port) on the remote machine.

  • On Windows, go to Control Panel > Windows Defender Firewall > Allow an App or Feature Through Firewall and ensure Remote Desktop is checked for both private and public networks.

• For additional security, use a VPN to connect before accessing RDP, which can help bypass strict firewall restrictions.

FAQ

 What versions of Windows support RDP?
RDP is supported on Windows 10 Professional, Enterprise, and Education editions. It is not available on Windows Home editions. If you're using a Home edition, you’ll need to upgrade to a Pro version to use RDP as a host.

 Can I connect to a Windows PC with RDP if it’s in sleep mode?
No, RDP cannot connect to a machine that is in sleep mode. Ensure the remote system is powered on and not in sleep mode before attempting to connect.

 How can I secure my RDP connection?
To secure your RDP connection, use Network Level Authentication (NLA), enable a VPN for remote access, change the default RDP port, and ensure strong passwords and two-factor authentication.

 What if my RDP connection is still slow despite troubleshooting?
If your RDP connection is slow, consider adjusting your session's display settings (reduce color depth and disable wallpaper) to improve performance. Also, use a direct Ethernet connection instead of Wi-Fi, as this can improve the stability of the connection.

 How do I know if my RDP port (3389) is open?
You can test whether port 3389 is open by using tools like Telnet or online port checkers. If the port is closed, ensure your firewall or router’s port forwarding is set correctly.

 Can I use RDP over the internet?
Yes, RDP can be used over the internet by configuring port forwarding on your router and making sure the remote system is accessible over a public IP address. However, to enhance security, it’s recommended to use a VPN or other secure tunneling methods.

For more troubleshooting tips and guides on RDP and remote access technologies, visit rossetaltd.com.