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。

• VMM: fixed an issue with Windows 10 guest kernel debugging over the network for Hyper-V paravirtualized VMs
• VMM: fixed a bug which prevented reading the saved state of the 'PATM' unit from VirtualBox 4.3.x (bug #14512)
• GUI: changed default OS type for Windows from Windows XP to Windows 7
• GUI: added another pre-defined guest screen resolution (bug #14384)
• GUI: fixed update check which was broken due to changing the location of the root certificates (bug #13096)
• GUI: fixed issues with synchronization of Caps lock / Num lock / Scroll lock on Windows hosts (bug #14302)
• GUI: don't crash during VM shutdown if 2D video acceleration and 3D support are enabled (Mac OS X hosts only)
• GUI: several seamless fixes for certain X11 window managers, also when used in multi-screen setups
• GUI: Log window size, position and cursor-position fixes
• Audio: fixed playing leftover/deprecated audio samples
• Audio: fixed playing audio after suspending the host (5.0 regression; Linux hosts using the ALSA backend)
• Audio: fixed playing short audio samples which were chopped off formerly
• Audio: fixed distortions on OS X when the sample rate of the guest stream and host device don't match
• Storage: fixed raw disk access and flat VMDK image access which would be always opened readonly (5.0.2 regression; bugs #14425, #14461)
• Storage: fixed initial encryption of VDI images after they were compacted (bug #14496)
• VGA: fix for certain graphics modes (bug #14516)
• NAT: don't freeze while the VM is paused if the network attachment mode is changed from/to NAT with activated port forwarding
• OVF: fixed duplicate USB controller entries in exported OVA/OVF (bug #14462)
• Shared Folders: fixed a path separator issue (bug #14434)
• Drag and drop: fixed crashes on OS X hosts when doing host-to-guest transfers
• VBoxManage: another attempt to not deny changing the network adapter type at VM runtime (5.0 regression; bug #14308)
• VBoxManage: fixed broken guestcontrol list command (5.0 regression)
• VBoxManage: fixed broken Guest Control stdout/stderr output (5.0 regression)
• Mac OS X hosts: fixed remaining problems with activated SMAP (Broadwell and later; bug #14412)
• Mac OS X hosts: fixed broken 3D support (5.0.2 regression; bug #14476)
• Linux hosts: Linux 4.2 fix
• Linux hosts: don't crash on older Linux distributions if the DBus service isn't running (bug #14543)
• Windows hosts: fixed the VERR_LDR_MISMATCH_NATIVE error message (bug #14420)
• Windows hosts: fix for Windows 10 build 10525 and later (bug #14502)
• Windows hosts: fixed network adapter enumeration on Windows 10 (bug #14437)
• Windows hosts: prevent intermittent host network disconnects during VM start/shutdown with bridged networking (bug #14500)
• Windows Additions: fixed the call to the memory allocation function (bug #14415)
• Linux Additions: be more forgiving if the compilation of the vboxvideo module fails (bug #14547)
• X11 Additions: fixed a number of small issues with dynamic resizing and full-screen and seamless modes.