Dual boot issue

  1. Windows recommends UEFI and GPT, but is fully comfortable with MBR+BIOS. You just need to be careful that the USB pen drive you use for W10 installation has been partitioned MBR and booted non-UEFI.

  2. Windows + Linux is still possible in GPT+UEFI mode. Consider what happens when you - like me - need FreeBSD too on your computer. FreeBSD is impossible to dual-boot/multi-boot under GPT+UEFI.