On 02/18/2012 12:52 PM, sean darcy wrote: > Trying to install the virtio-win-0.1-22.iso balloon driver on Windows > 2008R2: > > E:\Wlh\amd64>x:\microsoft\WinDDK\7600.16385.win7_wdk.100208-1538\tools\devcon\amd64\devcon.exe > install BALLOON.inf PCI\VEN_1AF4&DEV_1002&SUBSYS_00051AF4&REV_00 > Device node created. Install is complete when drivers are installed... > Updating drivers for PCI\VEN_1AF4 from E:\Wlh\amd64\BALLOON.inf. > devcon.exe failed. > 'DEV_1002' is not recognized as an internal or external command, > operable program or batch file. > 'SUBSYS_00051AF4' is not recognized as an internal or external command, > operable program or batch file. > 'REV_00' is not recognized as an internal or external command, > operable program or batch file. > > Any help appreciated. Since libvirt doesn't maintain the windows balloon driver, I would suggest that you ask this question on a better list, such as qemu-devel.