Система:  VirtualBox 4.2.16.86992 Final

Open Source VirtualBox и Closed-source Edition. Последняя, Closed-source Edition редакция имеет дополнительные возможности (Enterprise) присутствующие только в ней: Remote Display Protocol (RDP) сервер, виртуальный USB контроллер, USB over RDP (разделение USB устройств в сети через RDP-сервер, iSCSI initiator обеспечивающий виртуализацию для гостевых систем iSCSI устройств, виртуальный Serial ATA controller.
Unattended Edition - программа которая устанавливается автоматически. При установке Unattended программ нет нужды постоянно жать далее, вбивать серийник или крякать, русифицировать, etc – т.е. запустил инсталлятор и за несколько секунд (у кого за несколько минут J) установилась программа. После установки работа программы не отличается от той, которая была [установлена/ крякнута/ русифицирована/ etc] обычным способом.

Кроссплатформенность
Модульность
Поддержка USB 2.0, когда устройства хост-машины становятся доступными для гостевых ОС (только в проприетарной версии)
Встроенный RDP-сервер, а также поддержка клиентских USB-устройств поверх протокола RDP (только в проприетарной версии)
Экспериментальная поддержка образов жестких дисков VMDK/VMware
Поддержка iSCSI (только в проприетарной версии)
Поддержка виртуализации аудиоустройств
Поддержка различных видов сетевого взаимодействия (NAT, Host Networking via Bridged, Internal)
Поддержка дерева сохраненных состояний виртуальной машины (snapshots), к которым может быть произведен откат из любого состояния гостевой системы
Поддержка Shared Folders для простого обмена файлами между хостовой и гостевой системами

VMM: another TLB invalidation fix for non-present pages
VMM: fixed a performance regression (4.2.8 regression; bug #11674)
GUI: fixed a crash on shutdown
GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171)
VRDP: fixed a rare crash on the guest screen resize
VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused
USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs (bug #7462)
USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839)
USB: properly handle orphaned URBs (bug #11207)
BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests)
BIOS: don't use the ENTER / LEAVE instructions in the BIOS as these don't work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4)
DMI: allow to configure DmiChassisType (bug #11832)
Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479)
Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502)
Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617)
3D: seamless + 3D fixes (bug #11723)
3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718)
Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765)
Main/Properties: don't forget to make new guest properties persistent after the VM was terminated (bug #11719)
Main/Display: don't lose seamless regions during screen resize
Main/OVF: don't crash during import if the client forgot to call Appliance::interpret() (bug #10845)
Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long (bug #11814)
Main/OVF: don't fail if the appliance contains multiple file references (bug #10689)
Main/Metrics: fixed Solaris file descriptor leak
Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid
Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8 (bug #11610)
Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the --silent command line option is specified
Windows Additions: fixed problems with partial install in the unattended case
Windows Additions: fixed display glitch with the Start button in seamless mode for some themes
Windows Additions: Seamless mode and auto-resize fixes
Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet
Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default
Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter
Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix; bug #11709)
X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode
OS/2 Additions: made the mouse wheel work (bug #6793)
Guest Additions: fixed problems copying and pasting between two guests on an X11 host (bug #11792)