The issue was resolved after running the qemu-ga in dos window with Administrator privileges.
/Suresh ________________________________ From: desi babu <vdesib...@yahoo.com> To: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org> Sent: Monday, July 16, 2012 3:24 PM Subject: Qemu-ga : Guest Agent : Win 2008-64bit not working ________________________________ Qemu Guest Agent on Windows 2008 is not able to connect to virtio-serial socket. Windows Version : 2008 64 Bit Version : qemu-ga -V QEMU Guest Agent 1.1.0 VIRT-IO Serial Driver installed in windows. Driver Provider : Redhat Inc. Driver Date : 61.63.103.2200 Libvirt Settings. <channel type='unix'> <source mode='bind' path='/tmp/qemu-ga.w2008.0.sock'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> qemu-ga.exe critical : error opening path critical : error opening channel critical : failed to create guest agent channel critical : failed to initialize guest agent channel. Any recommendations or debugging methods to verify vertio-serial ? Thanks in advance.