“Run a virtual machine with a different OS inside your PC”

VirtualBox is a general-purpose full virtualizer for x86 hardware. This means that you can generate and run virtual machines using an operating system which is completely different from the one installed on your computer.

Presently, VirtualBox runs on Windows and Linux 32-bit hosts and supports a large number of guest operating systems including but not limited to Windows (NT, 2000, XP, Server 2003, Vista), DOS/Windows 3.x, Linux (2.4 and 2.6), and OpenBSD.

The virtual machines created with VirtualBox offer support for USB devices by means of a virtual USB controller, can be remotely run and controlled and can also share files and folders with the host system.

VirtualBox is being actively developed with frequent releases and has an ever growing list of features, supported guest operating systems and platforms it runs on. VirtualBox is a community effort backed by a dedicated company: everyone is encouraged to contribute while InnoTek ensures the product always meets professional quality criteria.

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Recent changes in Sun xVM VirtualBox:

GUI: fixed a bug which prevented to add more than one SATA drive from the GUI
GUI: fixed a regression introduced in 1.6.0: the fullscreen mode was left on every guest video mode switch
GUI: fixed several minor issues
Networking: fixed a host interface networking regression introduced in 1.6.0
VMM: fixed starting of VMs with AMD-V enabled
VMM: massive performance enhancements for AMD-V
VMM: stability improvements for AMD-V on Windows hosts
VMM: correctly detect AMD CPUs with erratum 170 (AMD-V)
VMM: detect inconsistent timestamp counters on certain AMD Phenom CPUs (Windows host only)
VMM: fixed KVM check (Linux hosts only) XPCOM: fixed several races
VMM: fixed a regression introduced in 1.6.0: Windows stuck during installation
SATA: improved performance with Vista guests
SATA: fixed statistics counter
Shared Folders: several fixes (iTunes download, speed up browsing)
ATA/IDE: fixed boot from CDROM if a medium was added while the boot menu was active
Networking: provide an Intel PRO/1000 T Server (82543GC) network device emulation which is recognized by Windows XP guests
Networking: fixes for the E1000 emulation (don't crash if not attached, fixed a bug in the statistics counter implementation)
NAT: don't crash if the guest sent a DHCPRELEASE message with an invalid IP address
NAT: fixed ARP reply for the NAT gateway and for the NAT name server if the guest IP range was changed
Internal Networking: fixed shutdown if more than two VMs are connected to the same network
BIOS: allow to change the DMI informatiton (see chapter 9.13, Con'guring the BIOS DMI information, page 125)
RTC: fixed UIP emulation to prevent jumping of time in Solaris guests
Windows host: VirtualBox installation directory corrected for 64 bits Windows
Windows host: fixed VBoxVRDP.exe symlink
Windows host: solved locking problems in raw partition VMDK support
Windows host: fixed stability during high system load (page fault in KeQueryActiveProcessors)