How to install Windows 8 or Windows 8.1 from USB

DVD is decommissioning...We now watch TV series online, rather than renting from DVD stores, listen to music online, now we can even install Windows operation system online, and Microsoft develops a tool to help this.

Update: this tool is only valid for official Microsoft image file. Microsoft will do a check on whether the img file is valid. 

The name is Windows7-USB-DVD Download tool.
The introduction page is this:
http://www.microsoftstore.com/store/msusa/html/pbPage.Help_Win7_usbdvd_dwnTool
You can also download it directly:
http://images2.store.microsoft.com/prod/clustera/framework/w7udt/1.0/en-us/Windows7-USB-DVD-tool.exe

When you download an iso image, you can use this tool to make a bootable USB device in 4 steps. Plug your device in your computer, make the boot device as flash drive, and then Bing! everything flies all the way...

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