These are the virt-customize operations that should work on Windows guests. All others likely do not work. --copy SOURCE:DEST --copy-in LOCALPATH:REMOTEDIR --delete PATH --edit FILE:EXPR This should work, although there may be problems with line endings. --firstboot SCRIPT --firstboot-command 'CMD+ARGS' Obviously you need to use a batch file or powershell script. We know this should work because we use it in virt-v2v. --hostname HOSTNAME --timezone TIMEZONE I *think* these should work, but I've not tested them. --mkdir DIR --move SOURCE:DEST --touch FILE --truncate FILE --truncate-recursive PATH --upload FILE:DEST --write FILE:CONTENT Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html