Linux

@just_another_person @Rubanski On most modern systems neither Windows nor Linux is going to hurt each other's boot record because usually on a dual boot system you're going to launch grub out of the boot block which is going to them find and mount the UEFI partition which is a fat-32 partition usually mounted on /boot/efi by Linux, and then grub is going to continue from a directory within /boot/efi, windows similarly will have a directory there, and grub if it finds both will present a menu at boot. Since both use separate directories on this UEFI System partition, one should not interfere with the other unless the partition is too small and you run out of disk space. I usually size my EFI partition at 512MB and that's always been more than sufficient for multiple operating systems. If you re-install WIndows, it will overwrite the boot block with it's own boot loader, but restoring it with grub will you back to where you were. If you are a real glutton for punishment, you can setup the Windows boot loader to chain load grub, this works as I have actually done it, more as a matter of curiosity than anything else. But I prefer to use Grub as the first boot loader as it's faster and less prone to exploding.