On Thu, Jan 15, 2015 at 10:42 PM, Chris Murphy <lists@colorremedies.com> wrote:
If these are UEFI computers, the drive uses GPT, or the manufacturer has enabled legacy booting (CSM-BIOS) and MBR partition scheme is used. We can install Fedora in either case. And regardless USB can be either GPT or MBR, UEFI supports both.

They are UEFI computers where the manufacturer has enabled legacy booting (CSM-BIOS) and the MBR partition scheme is used, but where legacy boot is very difficult to enable for USBs. Every new Windows 7 computer I've seen in the past year (small sample size: two or maybe three) has been set up like this.

On my computers, I have two boot options for each USB: normal UEFI boot and legacy boot. On these new computers, the legacy boot option is not present at all; to get to it, you have to muck around with the motherboard settings (normally to completely disable UEFI boot), and invariably there is no clear way to get to those (so prepare to press a bunch of function keys and reboot many times). Fedora can only be installed if you can manage to find the legacy boot option. By default, the boot menu is not presented at all: you'll just boot into Fedora after inserting the USB stick, and installation will fail with an obscure error message (complaining about the lack of an EFI system partition -- of course there is none!) at the partitioning stage.