Remote Desktop Connection Error Code 0x904 Extended Error Code 0x7 !!top!! Jun 2026

A: Primarily, yes. However, third-party RDP clients (like FreeRDP, Remmina) can also return "0x904" when they fail to read the server's security response correctly. Alternative RDP tools (MobaXterm, RoyalTS) often bypass the specific client-side winsock implementation that triggers this error in mstsc.exe . Moreover, virtualization tools like RustDesk and Dockur have documented issues where they improperly handle RDP handshakes, causing this exact error code.

Open the Start menu, type allow an app through Windows Firewall , and hit Enter. Click (requires administrator privileges). Scroll down to Remote Desktop . Ensure both Private and Public checkboxes are checked. Click OK to save changes. On the Local (Client) PC: A: Primarily, yes