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。

• GUI: the USB filter settings dialog should allow to specify the USB revision in hexadecimal format (bug #15400)
• GUI: fixed crash on certain hosts when pressing certain key combinations (Windows hosts only; bug #15719)
• GUI: fixed issue with updating the available-geometry on host-screen work-area resize
• GUI: don't crash / hang on certain environments if accessibility support is enabled
• GUI: fixed various issues in Unscaled HiDPI Output mode (bug #15707)
• GUI: extend the VM Input menu with Print Screen-related actions
• GUI: improved handling of inserting the Guest Additions ISO image by trying all available optical drives rather than only the first one and by not asking the user if he wants to force unmounting (which doesn't work in most cases anyway)
• API: default to RTC using UTC for Solaris 11 guests
• Settings: be less restrictive when reading a VM configuration containing a host-only adapter without an interface name
• Storage: fixed resizing VDI images resulting in an unbootable image under certain circumstances (bug #15983)
• NAT: fixed several 5.1.8 regressions on Mac OS X and Windows hosts (bug #16084)
• Audio: fixed a few 5.1.x regressions by using the audio code from 5.0.x until the audio overhaul is completed
• VBoxManage: fixed documentation of the storagectl command (bug #15971)
• Build system: another fix for building VirtualBox on systems which default to Python 3
• Windows hosts: hardening fix for Windows 10 build 14971 (bug #16202)
• Windows Additions: properly start the VirtualBox guest services even if the guest user name contains special characters (bug #15982)
• Solaris Additions: fixed preemptible mouse notification callback being executed under a spinlock for Solaris guests
• Linux hosts / guests: Linux 4.9 fixes (bugs #16155 and #16064)
• Linux Additions: fixed Linux kernel module override rule (thanks Mark Furneaux)