To open the Terminal Services Configuration Tool, click Start, point to Administrative Tools, and then click Terminal Services Configuration.
In the console tree, click Connections.
In the right-side pane, right-click RDP-Tcp, and then click Properties.
On the Network Adapter tab, click to select 1 from the Maximum connections list.
On the Permissions tab, click Add, type Everyone in the Enter the object names to select (examples) box, click Check Names, and then click OK.
In the Group or user names area, click to select the Everyone group.
In the Permissions for Everyone area, click to select the Deny check box to deny permission for Guest Access, and then click OK.