[libvirt-users] Windows guest and virtio serial port

I'm not sure, if it's correct mailing list to post this problem to. I'm having problems with Windows guest and virtio serial port. According to this manual: http://www.spice-space.org/page/Whiteboard/AgentProtocol I should get a named pipe on my guest VM after I create VirtIO sedial device and spicevmc channel. This works without any problems on Linux guest: ls /dev/virtio-ports/ com.redhat.spice.0 But on Windows guest I can see no such pipe: PipeList v1.01 by Mark Russinovich http://www.sysinternals.com Pipe Name                                    Instances       Max Instances ---------                                    ---------       -------- ----- InitShutdown                                      3               -1 lsass                                             4               -1 ntsvcs                                            3               -1 scerpc                                            3               -1 Winsock2\CatalogChangeListener-2b8-0              1                1 epmapper                                          3               -1 Winsock2\CatalogChangeListener-1ac-0              1                1 LSM_API_service                                   3               -1 TermSrv_API_service                               3               -1 Ctx_WinStation_API_service                        3               -1 eventlog                                          3               -1 Winsock2\CatalogChangeListener-174-0              1                1 atsvc                                             3               -1 wkssvc                                            6               -1 Winsock2\CatalogChangeListener-16c-0              1                1 SessEnvPublicRpc                                  3               -1 spoolss                                           3               -1 Winsock2\CatalogChangeListener-550-0              1                1 trkwks                                            3               -1 NlaSvcTask                                        1               -1 srvsvc                                            5               -1 browser                                           3               -1 Winsock2\CatalogChangeListener-710-0              1                1 Winsock2\CatalogChangeListener-228-0              1                1 Winsock2\CatalogChangeListener-230-0              1                1 HPUPDMon                                          1                1 MsFteWds                                          2               -1 PIPE_EVENTROOT\CIMV2SCM EVENT PROVIDER            1               -1 TDLN-3772-41                                      1                2 TDLN-3216-41                                      1                2 virtio serial drivers are installed on Windows guest VM. What I am missing here? Thank you.