Software⏱️ 3 min read📅 2026-06-11

How to Fix: Remote Desktop Dropouts: "Because of an error in data encryption, this session will end."

Remote Desktop connection issues with Vista box due to data encryption error.

Quick Answer: Try disabling Secure Hash Algorithm 1 (SHA-1) in Remote Desktop Connection settings.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. ✨ Wrapping Up

Remote Desktop Dropouts: "Because of an error in data encryption, this session will end." This issue affects users who are trying to connect to a Windows Vista box using Remote Desktop. The error message indicates that there is an issue with the data encryption, causing the session to end abruptly.

This problem can be frustrating for IT administrators and users alike. It's essential to identify the root cause of the issue and implement a solution to resolve it. In this guide, we will walk you through the steps to troubleshoot and fix Remote Desktop dropouts due to data encryption errors.

💡 Why You Are Getting This Error

  • The primary reason for Remote Desktop dropouts caused by data encryption errors is related to outdated or missing cryptographic protocols on the remote server. Windows Vista uses older encryption algorithms, such as AES-128-CBC, which may not be compatible with modern client devices and operating systems. This incompatibility can lead to issues during the connection process.
  • Another possible cause for Remote Desktop dropouts due to data encryption errors is related to incorrect or incomplete configuration of the Windows Firewall on the remote server. The firewall may block incoming connections from certain IP addresses or ports, causing the session to end prematurely.

🛠️ Step-by-Step Verified Fixes

Updating the Cryptographic Protocols

  1. Step 1: Step 1: Open the Remote Desktop Connection (RDP) settings on your local machine and select the 'Advanced' tab. Check if the cryptographic protocol is set to 'AES-256-CBC'. If not, update it to AES-256-CBC.
  2. Step 2: Step 2: On the remote server, open the Command Prompt as an administrator and run the following command: `gpupdate /force` This will update the Group Policy settings on the server.
  3. Step 3: Step 3: Restart the Remote Desktop service on the server by running the following command: `net stop rdsvcs` followed by `net start rdsvcs`.

Configuring the Windows Firewall

  1. Step 1: Step 1: On the remote server, open the Windows Firewall with Advanced Security console. Navigate to 'Inbound Rules' and find the 'Remote Desktop (TCP on port 3389)' rule. Ensure that the rule is enabled and the local port is set to 3389.
  2. Step 2: Step 2: If you are behind a NAT or router, ensure that the remote server's IP address is allowed in the firewall settings of your NAT/router.

✨ Wrapping Up

By following these steps, you should be able to resolve Remote Desktop dropouts caused by data encryption errors. Remember to regularly update your cryptographic protocols and configure your Windows Firewall settings to prevent similar issues in the future.

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