I gave up on dual-booting a long time ago and 2 OSes fighting over overwriting the MBR every time I wanted to upgrade one or the other. It's just so much easier to maintain 2 machines.
I solved for this by simply giving Windows and Linux a hard drive each. The boot records are completely separate, and neither one tries to read data from the other. (Personally I have no need, my NAS handles any file level syncing, but that's minimal anyway.) Both Windows and the Linux boot are registered in UEFI, so I asked my BIOS to disable the hard drive preference and pop up the boot menu each time, letting me pick which OS to use manually.
> I gave up on dual-booting a long time ago and 2 OSes fighting over overwriting the MBR every time
This is why UEFI was invented, and if You actually read the post, you would know it details how you set this up with UEFI instead of legacy boot and have none of those troubles.