制作可启动的用于安装Windows7的USB

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1. 下载并安装，运行Windows 7 USB/DVD download tool

2. 根据界面提示选择一个Windows 7 ISO文件和USB盘符

3. 开始复制，有可能复制时会出现以下错误：

We were unable to copy your files. Please check your USB device and the selected ISO file and try again.

这种情况下，退出工具，运行command到Windows 命令行界面，转到USB所在盘，假设为G盘，运行diskpart工具：

G:\>diskpart

Microsoft DiskPart version 6.1.7601
Copyright (C) 1999-2008 Microsoft Corporation.
On computer: PLIU21

DISKPART> list disk

Disk ### Status         Size     Free     Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0    Online          298 GB 1024 KB
Disk 1    Online         3972 MB      0 B

DISKPART> select disk 1

Disk 1 is now the selected disk.

DISKPART> clean

DiskPart succeeded in cleaning the disk.

DISKPART> create partition primary

DiskPart succeeded in creating the specified partition.

DISKPART> select partition 1

Partition 1 is now the selected partition.

DISKPART> active

DiskPart marked the current partition as active.

DISKPART> format quick fs=fat32

100 percent completed

DiskPart successfully formatted the volume.

DISKPART> assign

DiskPart successfully assigned the drive letter or mount point.

DISKPART> exit

Leaving DiskPart...

以上操作把USB重新格式化为FAT32，重新运行制作工具生成可启动的windows安装USB。