管理员身份运行cmd，输入diskpart
DISKPART>

然后依次输入：
list disk
select disk 1
clean
create partition primary
active
format fs=fat32 quick
assign

exit

然后将安装镜像所有文件拷贝进去

如果不能正常启动，则使用修复命令：I:\Boot\Bootsect.exe /NT60 I:

Gone are the days, when we used to burn CD and DVDs to install operating systems. Now all modern operating systems lets you install using PEN Drive / USB Storage Device / USB Stick. And this article describes step by step guide to format and create bootable Windows Vista / Windows 7 / Windows 8 USB Stick.

Prerequisites:

Windows Vista / Windows 7 / Windows 8 ISO or installation files
A 4GB USB 2.0 Storage device (Its recommended to use USB 2.0 or USB 3.0 device for optimal performance)
How To:

Plug your USB storage device. and run Command Prompt and execute the following commands one by one.
Diskpart
Run Disk partition utility

List disk
To get disk index that is used to perform disk partitioning.

Select disk n
Selects disk n to perform disk partitioning. n is the number for your USB flash drive you obtained from above command.

Clean
Flush your existing all USB drive’s partitions.

Create partition primary
Creates a partition as primary partition.

Active
Set the partition as active to hold bootmgr.

Format FS=NTFS QUICK
Perform a quick format on the USB Flash drive

Assign
Assign a drive letter to the partition

Exit
To quit Diskpart utility

Now copy all setup files to USB storage device… and that’s All.
Re-boot your PC with it, you will be able to boot and install Windows Vista/Windows 7/Windows 8 using USB Stick.
Note: If you face any trouble to boot with it or unable to boot, try this FIX.

I:\Boot\Bootsect.exe /NT60 I:
Where I: is the drive letter of USB Stick