NEC Express5800/320Fd-MR N8800-123F, EXP320K User Manual page 157

System Configuration 4-51
Changing a Mouse Property
Uncheck "Enhance pointer precision" when you use Windows Server 2003 on this server.
Go to [Control Panel] – [Mouse Properties] and select [Pointer Options] tab.
If it is unable to move a mouse curser on the Remote KVM console, adjust "Select a pointer speed:"
to the right on the "Faster" side.