On "BCD Deployment" tab, there are two functional groupings, "Create Bootable External Media" and "MBR Configuration Options". The first grouping includes specification of a partition to which the "Install BCD" operation will be applied. The second grouping allows one of two boot loaders to be written when "Write MBR" is selected, but does not include a partition specification. Does the "Write MBR" function always operate on the current boot partition, or does it operate on the partition selected for the "Install BCD" operation? Hopefully, it operates on the selected partition.