And the seat was already taken.
On the host computer, press Win + R , type , and press Enter.
On the , press Win + R , type sysdm.cpl , and hit Enter. Go to the Remote tab.
On the remote server, press Win + R , type certlm.msc , and hit Enter. Navigate to . If a certificate is expired, delete it.
This specific error combination indicates that the Remote Desktop client could not establish a session with the target host, but the root cause is typically related to network accessibility, firewall interference, or a stuck RDP session on the host machine. And the seat was already taken
: Enable Reconnect if the connection is dropped in the client settings.
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:
Or from Command Prompt (admin):
Packet loss, high latency, or brief drops in internet connectivity can cause the RDP session to time out during the initial handshake. Go to the Remote tab
Before diving into complex settings, ensure the physical and local network layers are stable. Restart your local router and modem.
The self-signed certificate used by Remote Desktop Services has expired and failed to renew automatically.
mstsc.exe /v:<remote_ip> /restrictedAdmin
If you are on an Azure instance, certificate store corruption often occurs in the MachineKeys folder. Renaming this folder (e.g., to MachineKeys_old ) via the Azure Portal's "Run command" and rebooting the server typically resolves the issue. 2. Address Network Instability and VPN Issues If a certificate is expired, delete it
Before diving into more complex fixes, it's always best to start with the simplest potential solutions. Follow this step-by-step guide, testing the connection after each step.
On the , open mstsc.exe → Advanced → uncheck “Only allow connections from computers running Remote Desktop with NLA” .
Insufficient bandwidth, high packet loss, or a sluggish VPN connection.