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 update check now uses the HTTP system proxy settings by default
• GUI: About dialog improvements. Copyable version text, do not close dialog on mouse-clicks and focus losing, explicit close button at the bottom of dialog and disabled close button fix on OS X.
• GUI: fixed bug when re-assigning shortcuts
• GUI: fixed default focus button in message-box dialogs
• GUI: fixed settings dialog which is opened if the network settings need to be changed at VM startup
• GUI: fixed crash during VM start if an early error message needs to be shown, for example Linux kernel modules not present
• Bridged Networking: fixed handling of guest DHCP requests without UDP checksum when bridging to a wireless interface
• Audio: latency fixes
• Guest Control: correctly set USERNAME and USERPROFILE environment variables
• Guest Control: several fixes
• API: properly restore NAT port forwarding rules when reverting to a snapshot
• Parallel ports: Several fixes allowing to enable two parallel ports for a VM
• VBoxManage: fixed wrong output of debugvm show command
• VBoxManage: fixed hang when specifying logging groups with debugvm log starting with h, for example hex
• Windows hosts: renamed VBoxStartup.log to VBoxHardening.log and provide this log file in the GUI log viewer
• Windows hosts: fixed a small memory leak in the Windows host interface driver (VBoxNetAdp) which caused a BSOD if the driver verifier is enabled
• Windows hosts: fixed a failure to start VMs on hosts where dsound.dll is not available
• Windows hosts: another fix for VERR_LDR_MISMATCH_NATIVE errors
• Windows hosts: fixed host-to-guest communication with bridged networking
• Windows hosts: fixed broken data receiving from the serial device with the named pipe backend if Kaspersky AV is installed
• Linux hosts: Linux 4.3 compile fixes
• Linux hosts: installer fix for certain systems
• Linux hosts / guests: native systemd support for the host/guest installer scripts. The scripts for re-compiling the kernel modules are now located at /sbin/rcvboxdrv (host) and /sbin/rcvboxadd (Guest Additions)
• Mac OS X hosts: GUI-related fixes for El Capitan
• Mac OS X hosts: fixed a problem with capturing USB devices under El Capitan
• Mac OS X hosts: allow colon character on shared folders
• Linux Additions: properly set the VBoxService process ID in the PID file
• Linux Additions: Guest Control fixes
• Windows Additions: fixed shutting down VBoxTray when running with older VirtualBox host versions
• Windows Additions: fixed video playback with VLC and Windows Media Player when the WDDM driver is used and 3D is not used
• Windows Additions: prevent a possible VLC crash when the WDDM driver is used and 3D is enabled by implementing YV12 surfaces