On my asus m5a97r2 motherboard I can only switch between "Windows UEFI mode" and "Other OS", and have the second one selected. On the same screen I can see that "Secure boot state" is enabled, whatever that mean. Also Launch CMS (Compatibity Support Module) is set to 'Auto'. Can't find any other settings with UEFI or non-UEFI mode. Regards 2014-02-27 22:16 GMT+01:00 Dimitri John Ledkov