Host Key in Virtual Server/PC

Some keyboard shortcuts such as CTRL+ALT+DELETE do not work within a virtual machine because of the interaction between the host operating system and the guest operating system. You can use Send CTRL+ALT+DEL from the Remote Control menu to use the functionality of the CTRL+ALT+DELETE keyboard shortcut. Or you can also use HOST KEY+DELETE.

Using the mouse in Virtual Server/PC

 If Virtual Machine Additions is installed on the virtual machine, you can move the pointer freely between the virtual machine window and the host OS.  If Virtual Machine Additions is not installed on the virtual machine, the virtual machine must capture the pointer before the mouse can be used within the virtual machine window. The virtual machine captures the pointer when you click the pointer inside the virtual machine window. If a pointer is captured by a virtual machine on which Virtual Machine Additions is not installed, the virtual machine must release it before you can use the mouse on the host operating system or in another virtual machine window. You can use the Host key to return the use of the mouse to the host operating system.

Virtual Server default configuration

What's the Virtual Server

Virtual Server is a server application allows enterprises to run multiple  operating systems such as Windows NT 4, 2000 and 2003 simultaneously on a single physical server. The Virtual Server cab be installed on any Windows 2003 server, and Windows XP Pro for non-production use only.