how to install windows 8 operating system on any usb device?

Now you can have Windows 8(.1) operating system installed on a flash drive and use it as a portable system, using it's new feature 'Windows To Go'.
But you can install it only on a bootable certified USB drive.

What if you do not have a bootable certified USB drive ?
Don't worry, recently I came to know about a software WinToUSB ,using which anyone can install windows 8 operating system on any external hard drive or even on a flash drive.

Once installed on your flash drive you can run this operating system on any computer system.Just plug-in your flash drive and select flash drive from booting option during start-up of windows.

How to install Windows OS on external hard drive or a pen drive ?

1. Get a .ISO file of windows 8(.1) operating system
2. Download and install WinToUSB
3. Run WinToUSB and follow steps as directed, 

for example I am installing windows 8 on my flash drive (USB 2.0), So process snapshots are given below.

1. Browse For your windows .iso file location

2. Select Destination disk and system partition

3. Click Next and wait till installation is completed.

Restart your pc and press F9 key [it depends on system, may be different for your system] to open advance boot option and select boot from you pen drive/flash drive.

Usually it takes long time for installing on flash drives, so  it is highly recommended to use a USB hard disk.

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