devices not listed in boot priority

[vinitachappar]

i want to install xindows 7 using a usb but every time i try to change boot priority to removable disk i cant.
the option removable disk is not even listed.
i have a asus motherboard.
this is frustrating.

 

[Warukyure]

When you're turning on the computer press F12 to manually go to the boot selection menu and select the USB stick manually. USB usually isn't an option to boot from in the boot priority menus in BIOS's.