Greetings, On 7/7/10, Doug Coats <dcoatshca at gmail.com> wrote: > I have a Windows 2003 guest on a CentOS 5.5 KVM host. I need to use the > serial port on the win2003 guest for the application it is serving. you are on your own as fas as non-centos guests are concerned. Have you enabled some " vitualisation option in the BIOS at all? Regards, Rajagopal