vagrant up connection time out

在一台重裝系統的機子上裝vagrant后 vagrant up 無法啟系統

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

  D:\work\vagrant>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...

將Vagrantfile的下面注釋去掉后

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

運行vagrant up 啟動 virtualbox 后，GUI提示

VT-x/AMD-V 硬件加速在您的系統中不可用。您的 64-位虛擬機將無法檢測到 64-位處理器，從而無法啟動。

在BOIS中開啟的cpu虛擬化后。重復上面的內容，依然是以上的問題。這個地方一直過不去，問題是出在了Hyper-V上面。在重裝系統后Hyper-V默認啟動。導致了virtualbox無法啟動。

程序功能-> 啟用或關閉Windows功能 -> 將Hyper-V的勾選去掉  ，重啟系統   

在執行一次 vagrant up 成功 。