What’s more, the USB drive must also be partitioned with GPT (GUID Partition Table) instead of traditional MBR. After some Google searching I discovered that this is because UEFI boot only recognizes FAT32 and will not show up NTFS devices during boot selection. However, the USB drive never showed as UEFI bootable in the Boot Menu. In order to perform a clean install of Windows 8 on my computer, I’ve made a bootable Windows 8 installation USB drive using Microsoft’s Windows USB/DVD download tool.