此软件是将ISO制作成U盘或DVD安装Windows 7的工具
以下为官方下载地址
http://store.microsoft.com/Help/ISO-Tool
http://images2.store.microsoft.com/prod/clustera/framework/w7udt/1.0/en-us/Windows7-USB-DVD-tool.exe

Windows 7 USB/DVD Download Tool OverviewWhen you purchase Windows 7 from Microsoft Store, you have the option to download an ISO file or compressed files. The Windows 7 USB/DVD Download tool allows you to create a copy of your Windows 7 ISO file on a USB flash drive or a DVD. To create a bootable DVD or USB flash drive, download the ISO file and then run the Windows 7 USB/DVD Download tool. Once this is done, you can install Windows 7 directly from the USB flash drive or DVD.

The ISO file contains all the Windows 7 installation files combined into a single uncompressed file. When you download the ISO file, you need to copy it to some medium in order to install Windows 7. This tool allows you to create a copy of the ISO file to a USB flash drive or a DVD. To install Windows 7 from your USB flash drive or DVD, all you need to do is insert the USB flash drive into your USB port or insert your DVD into your DVD drive and run Setup.exe from the root folder on the drive.

Note: You cannot install Windows 7 from the ISO file until you copy it to a USB flash drive or DVD with the Windows 7 USB/DVD Download tool and install from there.

The copy of the ISO file that the Windows 7 USB/DVD Download tool creates is bootable. Bootable media allows you to install Windows 7 without having to first run an existing operating system on your machine. If you change the boot order of drives in your computer's BIOS, you can run the Windows 7 installation directly from your USB flash drive or DVD when you turn on your computer. Please see the documentation for your computer for information on how to change the BIOS boot order of drives.

You may make one copy of the ISO file on a disc, USB flash drive or other media in order to install the software on a computer. Once you have installed the software on a computer, the license terms that accompany the software apply to your use of the software and replace these terms. The license terms for Windows 7, once accepted, permit you to make one copy of the software as a back-up copy for reinstallation on the licensed computer. If you do not delete the copy of the ISO file you made to install the software on your computer, then the copy of the ISO file constitutes your back-up copy. Installation

To install the Windows 7 USB/DVD Download tool:

1. Click here to download the Windows 7 USB/DVD Download tool installation file.
2. When you are prompted to either save the file to disk or run it, choose Run.
3. Follow the steps in the setup dialogs. You'll have the option to specify where to install the Windows 7 USB/DVD Download tool and whether to create shortcuts on your Start Menu or Windows Desktop.

You need to be an administrator on the computer you are installing the Windows 7 USB/DVD Download tool on. The tool requires the Microsoft .NET Framework version 2.0 or higher. If this is not already installed on your computer, the installation program will install it for you. In this case, you may have to reboot your machine to complete installation.

System Requirements

• Windows XP SP2, Windows Vista, or Windows 7 (32-bit or 64-bit)

• Pentium 233-megahertz (MHz) processor or faster (300 MHz is recommended)

• 50MB of free space on your hard drive

• DVD-R drive or 4GB removable USB flash drive

Using the Windows 7 USB/DVD Download Tool

Before you run the Windows 7 USB/DVD Download tool, make sure that you have already purchased Windows 7 ISO download from Microsoft Store and have downloaded the Windows 7 ISO file to your hard drive. If you have purchased Windows 7 but have not yet downloaded the ISO file, you can download the file from your Microsoft Store Account.

To make a copy of your Windows 7 ISO file:

1. Click the Windows Start button, and click Windows 7 USB/DVD Download tool in the All Programs list to open the Windows 7 USB/DVD Download tool.
2. In the Source File box, type the name and path of your Windows 7 ISO file, or click Browse and select the file in the Opendialog box.
3. Select USB to create a copy on a USB flash drive or DVD to create a copy on a DVD disk, then click Next.
4. If you are copying the file to a USB flash drive, select your USB device in the dropdown list and click Begin copying. If you are copying the file up to a DVD, click Begin burning.

When your Windows 7 ISO file is copied onto your chosen media, you can install Windows 7 by navigating to the root of your DVD or USB flash drive and double-clicking Setup.exe.