zhw2101024 写了：貌似现在的virtualbox有些功能做到扩展包里了，官网有一个叫Extension Pack的。本人没用win7，仅供参考
呵呵，没用的。
甲骨文官方文档：
http://www.virtualbox.org/manual/ch01.h ... installing
摘抄如下：
VirtualBox comes in many different packages, and installation depends on your host operating system. If you have installed software before, installation should be straightforward: on each host platform, VirtualBox uses the installation method that is most common and easy to use. If you run into trouble or have special requirements, please refer to Chapter 2, Installation details for details about the various installation methods.
Starting with version 4.0, VirtualBox is split into several components.
The base package consists of all open-source components and is licensed under the GNU General Public License V2.
Additional extension packs can be downloaded which extend the functionality of the VirtualBox base package. Currently, Oracle provides the one extension pack, which can be found at
http://www.virtualbox.org and provides the following added functionality:
The virtual USB 2.0 (EHCI) device; see the section called “USB settings”.
VirtualBox Remote Desktop Protocol (VRDP) support; see the section called “Remote display (VRDP support)”.
Intel PXE boot ROM with support for the E1000 network card.
VirtualBox extension packages have a .vbox-extpack file name extension. To install an extension, simply double-click on the package file, and the VirtualBox Manager will guide you through the required steps.
To view the extension packs that are currently installed, please start the VirtualBox Manager (see the next section). From the "File" menu, please select "Preferences". In the window that shows up, go to the "Extensions" category which shows you the extensions which are currently installed and allows you to remove a package or add a new one.
Alternatively you can use VBoxManage on the command line: see the section called “VBoxManage extpack” for details.
谷歌翻译：
VirtualBox的有多种不同的封装，并安装在你的主机操作系统而定。如果您已经安装软件之前，安装应简单：每个主机平台上，使用VirtualBox的安装方法是最常见和易于使用。如果您遇到困难或有特殊要求，请参阅第2章，约占各种安装方法安装详细细节。
从版本4.0开始，VirtualBox是分裂成几个部分。
基本包包括所有开源组件，根据GNU通用公共许可证V2的许可。
附加扩展包可以下载，这延长了VirtualBox的基本包的功能。目前，Oracle提供了一个扩展包，可在http://www.virtualbox.org发现并提供以下附加功能：
虚拟的USB 2.0（EHCI）的装置;看到所谓的“USB设置”一节。
VirtualBox的远程桌面协议（残疾人复业）的支持，见一节所谓的“远程显示器（残疾人复业的支持）”。
与英特尔的E1000型的PXE网络卡支持引导ROM。
VirtualBox的扩展包有一个。vbox的- extpack文件扩展名。要安装扩展，只需双击该包文件，单击，在VirtualBox的经理将引导您完成所需步骤。
要查看当前已安装的扩展包，请启动VirtualBox的经理（见下一节）。从“文件”菜单，请选择“首选项”。在窗口中显示出来，转到“扩展”类别，显示你目前有安装并允许你删除一个包或添加一个新的扩展。
另外，您可以使用VBoxManage命令行：见一节名为“VBoxManage extpack”了解详情。
