Backgound: My HP laptop has had Windows 10 Ent. LTSB 2016 installed for quite a while. Over the weekend, I set up a second system partition and installed Windows 8.1 Pro VL. Everything went well, but there is one thing bugging me. Windows 8.1 appears at the top of the boot screen as the default OS. If I don't make a selection within 30 seconds, then 8.1 boots automatically. Question #1: Is there any way to change this so Windows 10 appears on top of the boot menu as the default OS? Or am I stuck with this? Question #2: If I delete all of the existing partitions except the Windows 8.1 C:\ system partition, and then install Windows 10 Ent. LTSC 2019, will Windows 10 then appear at the top of the boot screen and replace 8.1 as the default OS?