vagrant up 失败有如下提示：
E:\vagrantbox\centos65>vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'centos65'...
==> default: Matching MAC address for NAT networking...
==> default: Setting the name of the VM: centos65_default_1467013098683_26652
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter 1: nat
default: Adapter 2: hostonly
==> default: Forwarding ports...
default: 22 (guest) => 2222 (host) (adapter 1)
==> default: Booting VM...
There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The command and stderr is shown below.
Command: ["startvm", "4f89ee30-b887-49ae-8605-e8bb198ce4e2", "--type", "headless"]
Stderr: VBoxManage.exe: error: The virtual machine 'centos65_default_1467013098683_26652' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in 'C:\Users\xxxVirtualBox VMs\centos65_default_1467013098683_26652\Logs\VBoxHardening.log'
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component MachineWrap, interface IMachine
1、查看环境变量是否设置正确
右击桌面“计算机”→【属性】→ 【高级系统设置】→【环境变量】
2、直接使用VirtualBox开启一个vm也会失败，基本上可以确定是VirtualBox版本的问题
有遇到过安装了VirtualBox-5.0.22-108108-Win.exe的版本在win7下用不了，卸载重装VirtualBox-4.3.12-93733-Win.exe之后可用。
VirtualBox-4.3.12-93733-Win.exe下载地址：http://download.virtualbox.org/virtualbox/4.3.12/VirtualBox-4.3.12-93733-Win.exe