vagrant up connection time out

在一台重装系统的机子上装vagrant后 vagrant up 无法启系统

  D:workvagrant>vagrant up
  Bringing machine 'default' up with 'virtualbox' provider...
  ==> default: VirtualBox VM is already running.

  D:workvagrant>vagrant up
  Bringing machine 'default' up with 'virtualbox' provider...
  ==> default: Clearing any previously set forwarded ports...
  ==> 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: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...
      default: Warning: Connection timeout. Retrying...

将Vagrantfile的下面注释去掉后

config.vm.provider "virtualbox" do |vb|
#   # Don't boot with headless mode
  vb.gui = true
#
#   # Use VBoxManage to customize the VM. For example to change memory:
#   vb.customize ["modifyvm", :id, "--memory", "1024"]
 end

运行vagrant up 启动 virtualbox 后，GUI提示

VT-x/AMD-V 硬件加速在您的系统中不可用。您的 64-位虚拟机将无法检测到 64-位处理器，从而无法启动。

在BOIS中开启的cpu虚拟化后。重复上面的内容，依然是以上的问题。这个地方一直过不去，问题是出在了Hyper-V上面。在重装系统后Hyper-V默认启动。导致了virtualbox无法启动。

程序功能-> 启用或关闭Windows功能 -> 将Hyper-V的勾选去掉  ，重启系统

在执行一次 vagrant up 成功。