I did indeed. I thought it was OK to do that. I noticed they both made their own directory in the EFI partition. And it was what Ubuntu's installer did by defau

I did indeed. I thought it was OK to do that. I noticed they both made their own directory in the EFI partition. And it was what Ubuntu's installer did by default when it detected windows. Good to know, thanks! To be honest in this day & age of virtualisation I hardly ever dual-boot anymore.