一次crash可能会造成虚拟机锁死的情况发生，这时点击take ownership 可能会提示如下字眼：
Taking ownership of this virtual machine failed. The virtual machine is in use by an application on your host computer.
解决方法是删除虚拟机目录下的所有.lck文件夹。
来自：http://blog.csdn.net/fisher_jiang/article/details/6992588
