On Mon, May 25, 2015 at 08:03:58AM +0000, Rakesh Agrawal wrote: "Probably" is the best answer I can give you. To access VMware, first read this: https://rwmj.wordpress.com/2011/05/10/tip-use-libguestfs-on-vmware-esx-gu... The easiest approach would be to use virt-customize -a /vmfs/guest-flat.vmdk --firstboot firstboot.bat where firstboot.bat would be some batch file that uninstalls the software. You might consider this to be cheating since it doesn't really uninstall the software, just schedules it to be uninstalled when the VM is booted. In which case, read on. If you know precisely what software you want to uninstall, you could instead work out all the changes that have to be made to the filesystem and Windows Registry. virt-diff + virt-win-reg will help greatly here. Then you can replay these changes on guests using some custom libguestfs code. Perhaps reading the code we use to install stuff in Windows during virt-v2v conversions will either inspire you or frighten you away from this approach :-) https://github.com/libguestfs/libguestfs/blob/master/v2v/convert_windows.ml Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/