Boot from USB is not possible with Windows 8

Usually, in order to boot from the USB drive, e.g., to install linux alongside windows versions, you would do the following at system startup.

Proc1:

1. Press Enter to interrup the normal startup.
2. Press F12 to select the temporary boot device, e.g., USB drive. 

At this point if you have Windows 8, you may realize that it is not possible to select the USB drive as the boot device.
To do so there is a change in the BIOS that need to be done. Please follow the following steps.

Proc2:

1. Reboot the machine 
2. Setup > Security > Secure Boot > Secure Boot = [Disabled]
3. Setup > Startup > UEFI/Legacy Boot = [Both]
4. F10 to save and exit.

(System reboot begins)

Now follow the above step 1 and 2 of Proc1 to select the temporary boot device.