Got a new board for son's PC and of course the linux install is just 'okay, whatever' but WIndows has shit itself, so reinstalling. A small chore, but I am reminded of Win 10's reluctance to install to something that's not the first drive, which is enormously annoying and *very* Microsoft. Thankfully I have an imaged backup which I can repair with WinPE.
Lets see if the Windows bootloader tries to eat my Linux partition again...