VirtualBox是一款免費且開源的虛擬化軟體，允許用戶在電腦上創建和運行虛擬機器。使用VirtualBox，用戶可以在不需要創建單獨的分區或購買額外硬體的情況下，在電腦上同時安裝和運行多個操作系統。

VirtualBox 的主要優勢之一是其易於使用。即使是對虛擬化技術幾乎沒有經驗的人，也可以輕鬆安裝和設置。VirtualBox 還提供廣泛的自定義選項，包括調整分配給每個虛擬機的 RAM、CPU 核心和硬碟空間的能力。

VirtualBox的另一個優點是其與多種作業系統的兼容性。使用者可以在其虛擬機器上安裝和運行Windows、Linux、macOS以及其他許多作業系統。這使得它成為開發人員、軟體測試人員以及需要在單一電腦上運行多個作業系統的人的絕佳工具。

VirtualBox 也提供了一系列的進階功能，如對 USB 設備、共享資料夾和網路配接器的支持。這些功能使得運行需要硬體或網路資源的軟體成為可能，如虛擬路由器、防火牆和伺服器。

VirtualBox 是需要在單一電腦上運行多個作業系統的人的極佳選擇。其易用性、多樣化的自訂選項以及與許多不同作業系統的相容性，使其成為開發人員、IT 專業人士和家庭用戶皆適用的多功能且強大的工具。

關鍵特性：

• 跨平台相容性。
• 直觀的圖形用戶介面。
• 支援各種作業系統。
• 與主機作業系統無縫整合。
• 快照和克隆。
• 網路功能。
• 虛擬設備支援。
• 擴充套件以增加功能。

This is a maintenance release. The following items were fixed and/or added:

• GUI: position off-screen windows to be fully visible again on relaunch in consistence with default-behavior (bug #15226)
• GUI: fixed the View menu / Full-screen Mode behavior on Mac OS X El Capitan
• GUI: fixed a test which allowed to encrypt a hard disk with an empty password
• GUI: fixed a crash under certain conditions during VM shutdown
• GUI: fixed the size of the VM list scrollbar in the VM selector when entering a group
• PC speaker passthrough: fixes (Linux hosts only; bug #627)
• Drag and drop: several fixes
• SATA: fixed hotplug flag handling when EFI is used
• Storage: fixed handling of encrypted disk images with SCSI controllers (bug #14812)
• Storage: fixed possible crash with Solaris 7 if the BusLogic SCSI controller is used
• USB: properly purge non-ASCII characters from USB strings (bugs #8801, #15222)
• NAT Network: fixed 100% CPU load in VBoxNetNAT on Mac OS X under certain circumstances (bug #15223)
• ACPI: fixed ACPI tables to make the display color management settings available again for older Windows versions (4.3.22 regression)
• Guest Control: fixed VBoxManage copyfrom command (bug #14336)
• Snapshots: fixed several problems when removing older snapshots (bug #15206)
• VBoxManage: fixed --verbose output of the guestcontrol command
• Windows hosts: hardening fixes required for recent Windows 10 insider builds (bugs #15245, #15296)
• Windows hosts: fixed support of jumbo frames in with bridged networking (5.0.16 regression; bug #15209)
• Windows hosts: don't prevent receiving multicast traffic if host-only adapters are installed (bug #8698)
• Linux hosts: added support for the new naming scheme of NVME disks when creating raw disks
• Solaris hosts / guests: properly sign the kernel modules (bug #12608)
• Linux hosts / guests: Linux 4.5 fixes (bug #15251)
• Linux hosts / guests: Linux 4.6 fixes (bug #15298)
• Linux Additions: added a kernel graphics driver to support graphics when X.Org does not have root rights (bug #14732)
• Linux/Solaris Additions: fixed several issues causing Linux/Solatis guests using software rendering when 3D acceleration is available
• Windows Additions: fixed a hang with PowerPoint 2010 and the WDDM drivers if Aero is disabled