问题描述：UUID已经存在
Cannot register the hard disk ‘D:\system_iso\centos6.5.vdi’ {05f096aa-67fc-4191-983d-1ed00fc6cce9}
because a hard disk ‘D:\system_iso\centos6\centos6.5.vdi’ with UUID {05f096aa-67fc-4191-983d-1ed00fc6cce9} already exists.
错误代码：
返回 代码:E_INVALIDARG (0x80070057)
组件:VirtualBoxWrap
界面:IVirtualBox {0169423f-46b4-cde9-91af-1e9d5b6cd945}
被召者 RC:VBOX_E_OBJECT_NOT_FOUND (0x80BB0001)
解决方法：
1.打开cmd ，切换目录至virtual box的安装目录下：（我的在： C:\APP\aux_tools\VirtualBox）
2.执行 vboxmanage 生成新的 UUID
格式： vboxmanage internalcommands sethduuid X:\path\xxx.vdi
例：vboxmanage internalcommands sethduuid “D:\system_iso\centos6\centos6.5.vdi”