Updated on 2024-04-19 GMT+08:00

Why Is My Remote Session Interrupted by a Protocol Error?

Symptom

An error message is displayed indicating that the remote session will be disconnected because of a protocol error.

Figure 1 Protocol error

Possible Causes

The registry subkey Certificate is damaged.

Solution

  1. In the Run dialog box, enter regedit and click OK to open the registry editor.
    Figure 2 Opening the registry editor
  2. Choose HKEY_LOCAL_MACHINE > SYSTEM > ControlSet001 > Control > Terminal Server > RCM.
  3. Delete Certificate.
    Figure 3 Deleting Certificate
  4. Restart the ECS.
  5. Choose Start > Administrative Tools > Remote Desktop Services > Remote Desktop Session Host Configuration.
    Figure 4 Opening Remote Desktop Session Host Configuration
  6. Right-click RDP-Tcp and choose Properties. In the displayed dialog box, click General and set Security layer to RDP Security Layer.
    Figure 5 RDP-Tcp properties