1. Press WIN + R;
2. Enter DISKPART
3. Enter following command (The attached picture is for yourreference.):
a. listdisk // check the connected disk
b. sel disk x // select the disk that you want to create (x is the disknumber)
c.clean // clean the partition table
d. create parpri //Create a primary partition
e. formatfs=fat32 label=”WINBOOT” quick // Format the partition. The “Label” and “quick” option is notnecessary.
f. active // make this partition Actived
4. Copy the install disc files to the created USB.
How to make a bootable[Win VISTA/7/8] USB flash Media
原文：http://blog.csdn.net/haylhf/article/details/39252249
