My Sony laptop was set to tri-boot between Win10, Win7 and Linux Debian. At that time I had a screen that looked similar to this except the options were Win10, Win7, Debian and Safe Mode. The BIOS was set to Legacy so I'm assuming I had a MBR and I believe I set it up using EasyBCD. It might also of been set when the system was Win8.1 before upgrading to Win10.
My drive died and the new drive is formatted GPT with Win10 and Debian. I am wondering how to get this screen to appear while booting so I can choose which operating system I want without using rEFInd or entering the systems firmware.
EasyBCD doesn't seem to work with GPT and I can't see the Debian partitions while in Win10 so I can't assign them a drive letter to run a "BCDEDIT" command. I am thinking the EFI partition must hold the key since I can mount it while in Debian and see various files (grub.efi, bootmgfw.efi etc...) but I have no idea how to work the key??? Everything I do seems to point me directly into Win10 without the above screen which allows me options.
Can someone please help getting that screen back with Debian and Safe Mode as options?
Windows Boot Manager
description Windows Boot Manager
Windows Boot Loader
description Windows 10
Partition 3 is Win10
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 System 243 MB 1024 KB
Partition 2 Reserved 16 MB 244 MB
Partition 3 Primary 194 GB 260 MB
Partition 4 Recovery 507 MB 195 GB
Partition 5 Primary 405 GB 195 GB
Partition 6 Unknown 139 GB 600 GB
Partition 7 Unknown 116 GB 740 GB
Partition 8 Unknown 74 GB 857 GB
Partition 5 is my Win10 home drive
Partition 6 is home drive in Debian
Partition 7 is Debian OS
Partition 8 is Swap partition
PS... What is that blue screen called? It's hard to google something when you don't know its name...