Hi, By using virtio-win-0.1.109.iso , it looks like vport0p devices are not configured (on a Windows 2008 R2 guest) due to no suitable driver found ( below setupapi.dev.log): [Boot Session: 2015/09/16 17:29:32.375] ump: Creating Install Process: DrvInst.exe 17:29:56.109 ndv: Retrieving device info... ndv: Setting device parameters... ndv: Searching Driver Store and Device Path... dvi: {Build Driver List} 17:29:56.328 dvi: Searching for hardware ID(s): dvi: {6fde7547-1b65-48ae-b628-80be62016026}\vioserialport cpy: Policy is set to make all digital signatures equal. dvi: Enumerating INFs from path list 'C:\Windows\inf' inf: Searched 0 potential matches in published INF directory inf: Searched 36 INFs in directory: 'C:\Windows\inf' dvi: {Build Driver List - exit(0x00000000)} 17:29:59.000 ndv: Selecting best match from Driver Store (including Device Path)... dvi: {DIF_SELECTBESTCOMPATDRV} 17:29:59.000 dvi: No class installer for 'vport0p3' dvi: No CoInstallers found dvi: Default installer: Enter 17:29:59.015 dvi: {Select Best Driver} ! dvi: Selecting driver failed(0xe0000228) dvi: {Select Best Driver - exit(0xe0000228)} ! dvi: Default installer: failed! ! dvi: Error 0xe0000228: There are no compatible drivers for this device. dvi: {DIF_SELECTBESTCOMPATDRV - exit(0xe0000228)} 17:29:59.062 ndv: {Core Device Install} 17:29:59.062 ! ndv: Installing NULL driver! dvi: Set selected driver complete. dvi: {DIF_ALLOW_INSTALL} 17:29:59.687 dvi: No class installer for 'vport0p3' dvi: Default installer: Enter 17:29:59.687 dvi: Default installer: Exit dvi: {DIF_ALLOW_INSTALL - exit(0xe000020e)} 17:29:59.687 dvi: {DIF_INSTALLDEVICE} 17:29:59.687 dvi: No class installer for 'vport0p3' dvi: Default installer: Enter 17:29:59.687 ! dvi: Installing NULL driver! dvi: Writing common driver property settings. dvi: {Restarting Devices} 17:30:00.093 dvi: Restart: {6FDE7547-1B65-48AE-B628-80BE62016026}\VIOSERIALPORT\4&7E8053E&1&03 dvi: Restart complete. dvi: {Restarting Devices exit} 17:30:00.187 dvi: Default installer: Exit dvi: {DIF_INSTALLDEVICE - exit(0x00000000)} 17:30:00.187 ndv: Device install status=0xe0000203 ndv: Performing device install final cleanup... ! ndv: Queueing up error report since device installation failed... ndv: {Core Device Install - exit(0xe0000203)} 17:30:00.187 ump: Server install process exited with code 0xe0000203 17:30:00.203 <<< Section end 2015/09/16 17:30:00.203 <<< [Exit status: FAILURE(0xe0000203)] Is there something I miss ? Thanks for help. J.P. Ribeauville P: +33.(0).1.47.17.27.87 Puteaux 3 Etage 5 Bureau 4 jpribeauville@axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.