甲骨文公司出品，免费全能虚拟机工具VirtualBox 4.3.12稳定版正式发布，本次集中修复旧版4.3.10大量bug，提升软件性能和稳定性，欢迎VirtualBox虚拟机新老用户下载使用。
VMM: fixed an occasional Guru Meditation (Mac OS X hosts only; bugs #12727,#12954)
VMM: fixed a rare condition that would fail to invalidate guest TLB entries or would invalidate them when not required (Windows hosts only)
VMM: fixed a VERR_NOT_SUPPORTED Guru Meditation seen with certain guests, e.g. OpenServer 5.0.7
VMM: more fixes for MSR emulation on certain hardware (tickets #12240, #12875)
GUI: fixed mouse positioning with mouse integration disabled and multiple guest screens (Windows hosts only; bug #9059)
GUI: fixed crash in VM manager (bug #12878)
GUI: fixed crash under rare conditions on entering/exiting fullscreen/seamless mode
Shared Clipboard: don't stop working after taking a snapshot (bug #12700)
AHCI: fixed a crash under rare circumstances
API: fixed a hang during VM shutdown under rare conditions
NAT: fixed generation of malformed ICMP error datagrams (4.3.10 regression)
NAT: fixed potential crash in DNS proxy
NAT Network: don't drop port forwarding rules after some time
NAT: fixed ARP cache corruption and network loss in Windows guest caused by iSCSI service activity
USB: improved check if a storage device is currently mounted to the host when the device is about to be attached to the VM (Mac OS X hosts only; #11038)
3D support: several fixes, including better support for Ubuntu 14.04
VRDP: fixed a potential crash on client disconnect (bug #12858)
VBoxSVC: fixed a race when a new client is started a few seconds after the last client terminated (Windows hosts only; bugs #11309, #12509)
VBoxSVC: fixed VirtualBox.xml registry corruption after VM renaming
VBoxSVC: fixed a potential crash caused by incorrect USB device filter (Mac OS X hosts only; #11038)
Windows hosts: partly support 32-bit COM on 64-bit systems
Windows host installer: implemented merge module (msm) support
Linux hosts: fixed dependency of boot script on older Debian systems (bug #12262)
Linux guests: fix symbolic link to shared folder helper (bug #12879)
Linux Additions: don't crash VBoxService during guest execute for users without a password (bug #12994)
Linux Additions: fixed a bug in guest execution where the guest process terminated with VERR_INTERRUPTED to the host
VirtualBox三大特点：免费、小巧、多国语言（含中文）。VirtualBox可以在 Linux/Mac 和 Windows 主机中运行， 并支持在其中安装 Windows (NT 4.0、2000、XP、Server 2003、Vista、Win7、Win8、Win8.1)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客户操作系统。
