after installing misbehaving software or infecting the guest with a virus), one can easily switch back to a previous snapshot and avoid the need of frequent backups and restores. This way, one can freely experiment with a computing environment. On top of that, with the use of another VirtualBox feature called “snapshots”, one can save a particular state of a virtual machine and revert back to that state, if necessary. Once installed, a virtual machine and its virtual hard disks can be considered a “container” that can be arbitrarily frozen, woken up, copied, backed up, and transported between hosts. Windows Additions: fixed the environment for guest processes (4.3.Testing and disaster recovery.Mac OS X Networking: prevent local traffic (VM-to/from-host) from leaking to wire (bug #12750).Windows installer: make the –silent parameter work again (bug #12764).
GUI: fixed a potential crash when opening the preferences menu (bug #12862).GUI: experimental HID LEDs synchronization for Windows and Mac OS X hosts: fixed keyboard re-synchronization if the feature is disabled (as done by default bug #12758).GUI: Mac OS X: removed the mini-toolbar minimize button which doesn’t work under Mac OS X full screen mode anyway.GUI: Mac OS X: experimental native full screen support for Mountain Lion and Mavericks (bug #12292).VMM: fixed a potential problem with COW pages if nested paging is not available.
VMM: fixed single-stepping for real-mode guests (VT-x without unrestricted guest execution) and some I/O instructions (bug #12636).
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