Computer not booting from bootable usb flash drive?

[adasilva95]

I have created a bootable USB drive to install Windows Server 2008 R2. However, whenever I set the USB to boot in the BIOS, or use the F8 menu to select the USB as the boot device, it gives me the error "Reboot and Select proper Boot device." Why isn't it booting from my flash drive?

 

[Phillip Corcoran]

It sounds like you haven't prepared the drive properly to make it bootable.