开源虚拟机：VirtualBox 4.1.8.75467 发布了

VirtualBox 4.1.8 发布了，这是一个维护版本，主要改进内容如下：

• VMM: fixed VERR_MAP_FAILED during savestate under certain circumstances (bug #7929)
• GUI: stop updating the VM status icons when the VM is paused (bug #8368)
• VBoxManage: fixed wrong return code after startvm (bug #9642)
• BIOS: fixed hang at launch of DOS applications generated by Clipper 5.3 (note that hardware virtualization may be required)
• USB: fixed OS/2 boot hang when using recent USB drivers
• NAT: increase maximum number of parallel connections making connections with port forwarding more robust (#8471)
• Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
• Main: don't crash if a medium is ejected twice (bug #9922)
• VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
• VRDP: fixed screen freeze (bug #9620)
• OVF/OVA: fixed broken disk images on import under rare circumstances
• OVF/OVA: better error message when importing corrupted appliances
• VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
• 3D Support: Fixed fullscreen mode issues for ATI graphics (bug #9775), Windows Media Player rendering for XPDM-based Direct3D support (bug #8341). Multiple fixes to XPDM and WDDM - based 3D support for Windows Guests and for 3D support in general
• Linux hosts: fixes for Fedoras Linux 2.6.41 (bug #9948)
• Linux hosts/guests: fixes for Linux 3.2 (bug #9743)
• Solaris Additions: various shared folder fixes (bugs #9856, #9862, #9917)
• Windows Additions: various fixes for Direct3D support (un)installation, added detection of missing or wrong Direct3D system files

VirtualBox 是一款功能强大的 x86 虚拟机软件，它不仅具有丰富的特色，而且性能也很优异。

VirtualBox 原先是德国一家软件公司InnoTek所开发的虚拟系统软件（已被SUN收购，而SUN已被Oracle收购），它不仅具有丰富的特色，而且性能 也很优异。VirtualBox 可以在 Linux 和 Windows 主机中运行，并支持在其中安装 Windows (NT 4.0、2000、XP、Server 2003、Vista)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客户操作系统。假如你曾经有用过虚拟机软件的经历的话，相信使用 VirtualBox 不在话下。即便你是一个新手，也没有关系。VirtualBox 提供了详细的文档，可以助你在短期内入门。

下载地址：https://www.virtualbox.org/wiki/Downloads