VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
# The following items were fixed and/or added:
* GUI: fixed validation warning on global settings / proxy page (4.2.2 regression)
* GUI: fixed crash with multiple guest screens on certain conditions (OS X hosts only)
* VBoxBalloonCtrl: fixed command line argument handling of ballooning module
* VRDP: fixed occasional crash during a video playback in the guest
* BIOS: fixed broken DMI information (4.2 regression)
* BIOS: workaround for booting from Windows 2000 floppy disks
* EFI: fixed video mode selection loss on VM reboot
* Parallel: fixed parallel port printing failure/ paper queue empty error (Windows hosts only)
* NAT: fixed crash on alias-less DNS responses when host-resolver is used
* Storage: fixed hang under rare circumstances