The computers come with a default settings for the UEFI (or BIOS). In this case, it looks like the defaults are different for 64bit Windows 8 and above (the OS optimized default) as compared with older versions of Windows.
The computers come with a default settings for the UEFI (or BIOS). In this case, it looks like the defaults are different for 64bit Windows 8 and above (the OS optimized default) as compared with older versions of Windows.