Error: GRUB Install Debian 10.3

Hi,

I'm a fan of Debian, since years now,

I had some difficulties installing Debian 10.3
Especialy when installing GRUB at the end..

I had my MS-Windows on sdb..
Installing Debian on sda..

both with DOS partition table..

After few tries GRUB seemed to fail..

I had to install non-EFI version!

Can you tell me why?



Ali ISIN
Debian fan