VirtualBox is a general-purpose full virtualizer for x86 hardware, targeted at server, desktop and embedded use. Virtual-box is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is Virtual-box an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL) version 2.

Changelog of Virtualbox 4.3:
  • VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements.
  • VMM: introduced a lightweight instruction interpreter for situations not handled by hardware virtualization
  • GUI: extended messaging mechanism (new non-modal popup overlays used to show non-critical warnings and provide user with additional information)
  • GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
  • GUI: video capturing support.
  • Added USB touch device emulation
  • Added experimental support for webcam passthrough complementing USB passthrough (see the manual for more information)
  • Added SCSI CD-ROM emulation, including boot support
  • VRDP: support for IPv6
  • Guest Control: guest sessions now are running in dedicated, impersonated session processes (needs at least Guest Additions 4.3 installed)
  • Guest Control: implemented IGuestFile support
  • NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service
  • Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

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