VirtualBox is a free and open-source virtualization software that allows users to create and run virtual machines on their computers. With VirtualBox, users can install and run multiple operating systems simultaneously on their computer without having to create separate partitions or buy additional hardware.

one of the main advantages of VirtualBox is its ease of use. It is simple to install and set up, even for those who have little or no experience with virtualization technology. VirtualBox also offers a wide range of customization options, including the ability to adjust the amount of RAM, CPU cores, and hard disk space allocated to each virtual machine.

Another great feature of VirtualBox is its compatibility with a wide range of operating systems. Users can install and run Windows, Linux, macOS, and many other operating systems on their virtual machines. This makes it an excellent tool for developers, software testers, and anyone who needs to run multiple operating systems on a single computer.

VirtualBox also offers a range of advanced features, such as support for USB devices, shared folders, and network adapters. These features make it possible to run software that requires hardware or network resources, such as virtual routers, firewalls, and servers.

VirtualBox is an excellent choice for anyone who needs to run multiple operating systems on a single computer. Its ease of use, wide range of customization options, and compatibility with many different operating systems make it a versatile and powerful tool for developers, IT professionals, and home users alike.

Key Feature:

• Cross-platform compatibility.
• Intuitive graphical user interface.
• Support for various operating systems.
• Seamless integration with host operating system.
• Snapshots and clones.
• Networking capabilities.
• Virtual device support.
• Extension packs for additional functionality.

• VMM: more work on improving the emulation of certain MSR registers
• VMM: fixed a VERR_INVALID_RPL Guru Meditation when booting certain guests
• VMM: experimental support for SSE 4.1 / SSE 4.2 passthrough, see the manual for more information how to enable it
• VMM: fix for recent Linux kernels with software virtualization
• GUI: experimental HID LEDs synchronization for Windows hosts, see the manual for more information
• GUI: warn the user if the Oracle Extension Pack is not installed and the user tries to activate the remote display feature
• GUI: make sure that a minimized guest (using mini toolbar in fullscreen/seamless mode) keeps the minimized state
• GUI: popup banner's "do not show this message again" check-box replaced with corresponding button
• GUI: network adapter cables can now be connected/disconnected directly through the running virtual machine Devices / Network menu a Network status-bar indicator
• GUI: the new VM wizard now proposes 64-bit guests on 64-bit hosts by default; better distinction between 32-bit OS types 64-bit OS types
• GUI: better error message if appliance import fails
• GUI: allow to set host-combination to 'None' using the Global settings / Input page
• GUI: don't switch the guest to a black screen during online snapshot merge
• VBoxManage: when exporting an appliance, support the suppression of MAC addresses, which means they will be always recreated on import, avoiding duplicate MAC addresses for VMs which are imported several times
• AHCI: fixed a VM hang during suspend under certain circumstances
• AHCI: fixed a VM hang during online snapshot merge under certain circumstances
• AHCI: fixed a bug which resulted in Windows XP guest hangs if a SATA CDROM is attached
• AHCI: fixed a Guru Meditation under certain conditions
• AHCI: ejecting a CD/DVD medium failed under certain conditions
• AHCI: disk hotplugging fixes
• NAT: transparent handling of host sleep/resume and network configuration changes if the dnsproxy is enabled or if the hostresolver is used
• NAT: fixed crash and misbehaviour under some circumstances with ICMP packets having TTL=1
• NAT Network: fixed IPv6 reassembly
• NAT Network: ping proxy implemented
• OVF: fixed reading of the OVF 0.9 section element
• OVF: several fixes
• 3D: several fixes, multiscreen fixes
• 3D: include 3D content in captured videos
• 3D: include 3D content in captured screenshot
• VGA: proper handling of legacy graphics modes if the Guest Additions are active
• USB: fixed crash during isochronous transfer under rare circumstances
• BIOS: better disk geometry handling of SCSI drives
• API: fix crashes in Java API clients using the XPCOM binding, happened with output parameters only
• VBoxSVC: documented the handling of host power management events (see the manual for more information) and added an extradata item for configuring the handling of the battery-low event
• VBoxSVC: fixed a bug which could trigger a crash if a VM snapshot was restored the second time and the VM has associated bandwidth groups
• VBoxSVC: properly detect ifconfig if located in /bin
• Shared Folders: fixed a failure to restore transient shared folders when starting a VM from a saved state
• Mac OS X hosts: fixed issue when the application icon was frozen in the dock if the bridging interface was not connected to a network
• Linux hosts: also consider the physical package ID when determining the number of physical CPU cores
• Linux hosts / guests: don't warn in kernel log if memory allocation fails
• Solaris hosts: fixed the autostart SMF script
• Windows hosts: fixes for non-ANSI code page user names and similar environment contents
• Windows hosts / guests: fixed setting and using a guest user's process environment variables (relevant for Guest Control)
• Windows Additions: fixed handle leaks in VBoxTray
• Windows Additions: fixed a crash while detecting active guest users
• Windows Additions: fixed restoring backed up D3D files on XPDM -> WDDM upgrade
• Guest Control: fixed setting and using a guest user's process environment variables
• Linux Additions: support Enterprise Linux 6.5 kernels
• Linux Additions: fixed CPU hot-remove on newer Linux kernels
• Linux / Solaris Additions: don't automount a shared folder which is already mounted
• X11 Additions: support X.Org Server 1.15