vagrant upできない(error message for that particular provider.)

###環境
・Windows 10 pro
・vagrant 2.2.5
・vitual box 2.2.6

###エラー内容と解決方法
以下のようなエラーが出てしまって`vagrant up`ができませんでした....

````
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.
PS C:\Users\beyond_tokuhara\Myvagrant\MyCnetOS7> vagrant up
No usable default provider could be found for your system.

Vagrant relies on interactions with 3rd party systems, known as
"providers", to provide Vagrant with resources to run development
environments. Examples are VirtualBox, VMware, Hyper-V.

The easiest solution to this message is to install VirtualBox, which
is available for free on all major platforms.

If you believe you already have a provider available, make sure it
is properly installed and configured. You can see more details about
why a particular provider isn't working by forcing usage with
`vagrant up --provider=PROVIDER`, which should give you a more specific
error message for that particular provider.
````

解決方法を調べたところ、vagrantとvitual boxがバージョンの不一致で
エラーが起こるものでした！！

なので、一度アンインストールして再度インストールすれば
この問題は解決しますヽ（￣￣∇￣￣）ノ ﾗﾝﾗﾝ♪

＊こちらがダウンロードリンクです
[vitual box](https://www.virtualbox.org/)
[vagrant](https://www.vagrantup.com/downloads)

###結果
````
PS C:\Users\Myvagrant\MyCnetOS7> vagrant init centos/7
`Vagrantfile` already exists in this directory. Remove it before
running `vagrant init`.
PS C:\Users\Myvagrant\MyCnetOS7> vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'centos/7' could not be found. Attempting to find and install...
    default: Box Provider: virtualbox
    default: Box Version: >= 0
==> default: Loading metadata for box 'centos/7'
    default: URL: https://vagrantcloud.com/centos/7
==> default: Adding box 'centos/7' (v2004.01) for provider: virtualbox
    default: Downloading: https://vagrantcloud.com/centos/boxes/7/versions/2004.01/providers/virtualbox.box
Download redirected to host: cloud.centos.org
    default:
    default: Calculating and comparing box checksum...
==> default: Successfully added box 'centos/7' (v2004.01) for 'virtualbox'!
==> default: Importing base box 'centos/7'...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'centos/7' version '2004.01' is up to date...
==> default: Setting the name of the VM: MyCnetOS7_default_1597143828287_87289
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
==> default: Forwarding ports...
    default: 22 (guest) => 2222 (host) (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:
    default: Vagrant insecure key detected. Vagrant will automatically replace
    default: this with a newly generated keypair for better security.
    default:
    default: Inserting generated public key within guest...
    default: Removing insecure key from the guest if it's present...
    default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: No guest additions were detected on the base box for this VM! Guest
    default: additions are required for forwarded ports, shared folders, host only
    default: networking, and more. If SSH fails on this machine, please install
    default: the guest additions and repackage the box to continue.
    default:
    default: This is not an error message; everything may continue to work properly,
    default: in which case you may ignore this message.
==> default: Rsyncing folder: /cygdrive/c/Users/beyond_tokuhara/Myvagrant/MyCnetOS7/ => /vagrant

PS C:\Users\Myvagrant\MyCnetOS7> vagrant status
Current machine states:

default                   running (virtualbox)

The VM is running. To stop this VM, you can run `vagrant halt` to
shut it down forcefully, or you can run `vagrant suspend` to simply
suspend the virtual machine. In either case, to restart it again,
simply run `vagrant up`.
````

こちらで成功ですＵ＼(●~▽~●)Уイェーイ！