vagrant init がうまくいかない

###前提・実現したいこと
Windows8.1を使っており、Vagrant 1.9.1を使って仮想環境を構築したい。Virchalboxに仮想マシンを生成したい。
初心者ですが、なにとぞご教授よろしくお願いします。

###発生している問題・エラーメッセージ

Vagrant failed to initialize at a very early stage:

The plugins failed to load properly. The error message given is
shown below.

cannot load such file -- vagrant-vbguest

###該当のソースコード

C:\Users\〇〇>cd vagrant & cd ubuntu14.04

C:\Users\〇〇\vagrant\ubuntu14.04>vagrant init
Vagrant failed to initialize at a very early stage:

The plugins failed to load properly. The error message given is
shown below.

cannot load such file -- vagrant-vbguest

###試したこと
[vagrant plugin expunge]の実行を試したところ、以下のようなメッセージが表示されたが結果は同じだった

C:\Users\〇〇\vagrant\ubuntu14.04>vagrant
1Would you like Vagrant to attempt to reinstall current plugins? [Y/N]:y
2
3This command permanently deletes all currently installed user plugins. It
4should only be used when a repair command is unable to properly fix the
5system.
6
7Continue? [Y/N]:y
8
9All user installed plugins have been removed from this Vagrant environment!
10
11Vagrant will now attempt to reinstall user plugins that were removed.
12Installing the 'vagrant-share' plugin. This can take a few minutes...
13Fetching: micromachine-2.0.0.gem (100%)
14Fetching: vagrant-vbguest-0.13.0.gem (100%)
15Installed the plugin 'vagrant-share (1.1.6)'!
16Installing the 'vagrant-vbguest' plugin. This can take a few minutes...
17Installed the plugin 'vagrant-vbguest (0.13.0)'!
18
19C:\Users\〇〇\vagrant\ubuntu14.04>vagrant init
20Vagrant failed to initialize at a very early stage:
21
22The plugins failed to load properly. The error message given is
23shown below.
24
25cannot load such file -- vagrant-vbguest

###補足情報(言語/FW/ツール等のバージョンなど)
ボックスとプラグインの種類とバージョンは以下の通りです。

C:\Users\〇〇\vagrant\ubuntu14.04>vagrant
1ubuntu14.04 (virtualbox, 0)
2
3C:\Users\〇〇\vagrant\ubuntu14.04>vagrant plugin list
4vagrant-share (1.1.6)
5vagrant-vbguest (0.13.0)