Windows 7 64位在这里。去了Vagrant stable version downloads page。下载使用所有建议的默认值安装的Windows 64位安装程序，然后重新启动。
然后阅读他们的Getting Started Guide。打开命令提示符：
vagrant init hashicorp/precise32
并看到以下输出：
A `Vagrantfile` has been placed in this directory. You are now
ready to `vagrant up` your first virtual environment! Please read
the comments in the Vagrantfile as well as documentation on
`vagrantup.com` for more information on using Vagrant.
行。到现在为止还挺好。然后我做：
vagrant up
这是输出：
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'hashicorp/precise32' could not be found. Attempting to find and install...
default: Box Provider: virtualbox
default: Box Version: >= 0
==> default: Loading metadata for box 'hashicorp/precise32'
default: URL: https://atlas.hashicorp.com/hashicorp/precise32
==> default: Adding box 'hashicorp/precise32' (v1.0.0) for provider: virtualbox
default: Downloading: https://atlas.hashicorp.com/hashicorp/boxes/precise32/versions/1.0.0/providers/virtualbox.box
default:
==> default: Successfully added box 'hashicorp/precise32' (v1.0.0) for 'virtualbox'!
==> default: Importing base box 'hashicorp/precise32'...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'hashicorp/precise32' is up to date...
==> default: Setting the name of the VM: vms_default_1421176231425_15801
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter 1: nat
==> default: Forwarding ports...
default: 22 => 2222 (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
default: SSH address: 127.0.0.1:2222
default: SSH username: vagrant
default: SSH auth method: private key
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Authentication failure. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
default: Warning: Remote connection disconnect. Retrying...
Timed out while waiting for the machine to boot. This means that
Vagrant was unable to communicate with the guest machine within
the configured ("config.vm.boot_timeout" value) time period.
If you look above, you should be able to see the error(s) that
Vagrant had when attempting to connect to the machine. These errors
are usually good hints as to what may be wrong.
If you're using a custom box, make sure that networking is properly
working and you're able to connect to the machine. It is a common
problem that networking isn't setup properly in these boxes.
Verify that authentication configurations are also setup properly,
as well.
If the box appears to be booting properly, you may want to increase
the timeout ("config.vm.boot_timeout") value.
然后我阅读了入门指南的下一部分：
现在想象一下你曾经做过的每个项目都很容易设置。
LOL
为什么我收到此错误？