A VM loading module loads a virtual machine snapshot of a virtual machine from a first computing device to a mobile device. The virtual machine runs on the first computing device and the virtual machine snapshot includes a copy-on-write (“COW”) file and an image file of files from the virtual machine. A VM launch module launches the virtual machine on a second computing device, which reads the virtual machine snapshot from the mobile device and the second computing device records changes to the COW file stored on the second computing device while running the virtual machine. A session termination module terminates a session of execution of the virtual machine running on the second computing device and copies the COW file from the second computing device to the mobile device. The COW file includes changes to the virtual machine snapshot from the virtual machine on the second computing device.