The OS installation failed, so I tried boot repair but it didn't work.

boot-repair-4ppa2081-zorin1 [20251229_2235]

============================== Boot Info Summary ===============================

=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 2048
of the same hard drive for core.img. core.img is at this location and
looks for (,gpt3)/boot/grub. It also embeds following components:

modules
---------------------------------------------------------------------------
fshelp ext2 part_gpt biosdisk
---------------------------------------------------------------------------

=> Syslinux MBR (5.00 and higher) is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

File system:       BIOS Boot partition
Boot sector type:  Grub2's core.img
Boot sector info: 

sda2: __________________________________________________________________________

File system:       
Boot sector type:  FAT32
Boot sector info: 

sda3: __________________________________________________________________________

File system:       
Boot sector type:  Unknown
Boot sector info: 

sdb1: __________________________________________________________________________

File system:       vfat
Boot sector type:  SYSLINUX 6.04
Boot sector info:  Syslinux looks at sector 32864 of /dev/sdb1 for its 
                   second stage. The integrity check of Syslinux failed. 
                   No errors found in the Boot Parameter Block.
Operating System:  
Boot files:        /boot/grub/grub.cfg /syslinux.cfg 
                   /efi/boot/bootia32.efi /efi/boot/bootx64.efi 
                   /efi/boot/grubx64.efi /efi/boot/mmx64.efi /ldlinux.sys

================================ 0 OS detected =================================

================================ Host/Hardware =================================

CPU architecture: 64-bit
Video: 4th Gen Core Processor Integrated Graphics Controller from Intel Corporation
Live-session OS is Zorin 64-bit (Zorin OS 18, noble, x86_64)

===================================== UEFI =====================================

BIOS/UEFI firmware: Version 4.40 (4.40) from TOSHIBA
This live-session is in Legacy/BIOS/CSM mode (not in EFI mode).

============================= Drive/Partition Info =============================

Disks info: ____________________________________________________________________

Partitions info (1/3): _________________________________________________________

Partitions info (2/3): _________________________________________________________

Partitions info (3/3): _________________________________________________________

fdisk -l (filtered): ___________________________________________________________

Disk sda: 238.47 GiB, 256060514304 bytes, 500118192 sectors
Disk identifier: 3F93681D-CD6C-49B9-9578-02E6F3DF326E
Start End Sectors Size Type
sda1 2048 4095 2048 1M BIOS boot
sda2 4096 1054719 1050624 513M EFI System
sda3 1054720 500117503 499062784 238G Linux filesystem
Disk sdb: 28.92 GiB, 31054626816 bytes, 60653568 sectors
Disk identifier: 0x13ad21dc
Boot Start End Sectors Size Id Type
sdb1 * 2048 60653503 60651456 28.9G c W95 FAT32 (LBA)

parted -lm (filtered): _________________________________________________________

sda:256GB:scsi:512:512:gpt:ATA SUNEAST SE800 SS:;
1:1049kB:2097kB:1049kB:::bios_grub;
2:2097kB:540MB:538MB:fat32:EFI System Partition:boot, esp;
3:540MB:256GB:256GB:::;
sdb:31.1GB:scsi:512:512:msdos:ELECOM MF-HTU3B:;
1:1049kB:31.1GB:31.1GB:fat32::boot, lba;

blkid (filtered): ______________________________________________________________

NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1
├─sda2
└─sda3
sdb
└─sdb1 vfat B86A-EA8B 13ad21dc-01 ZORIN OS 18

Mount points (filtered): _______________________________________________________

         Avail Use% Mounted on

/dev/sdb1 25.4G 12% /cdrom

Mount options (filtered): ______________________________________________________

/dev/sdb1 vfat ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro

====================== sdb1/boot/grub/grub.cfg (filtered) ======================

Try or Install Zorin OS
Try or Install Zorin OS (safe graphics)
Try or Install Zorin OS (modern NVIDIA drivers)
UEFI Firmware Settings
Power Off

========================= sdb1/syslinux.cfg (filtered) =========================

DEFAULT loadconfig

LABEL loadconfig
CONFIG /isolinux/isolinux.cfg
APPEND /isolinux/

==================== sdb1: Location of files loaded by Grub ====================

       GiB - GB             File                                 Fragment(s)
        ?? = ??             boot/grub/grub.cfg                             1

================== sdb1: Location of files loaded by Syslinux ==================

       GiB - GB             File                                 Fragment(s)
        ?? = ??             syslinux.cfg                                   1
        ?? = ??             ldlinux.sys                                    1

======================== Unknown MBRs/Boot Sectors/etc =========================

Unknown BootLoader on sda3

Suggested repair: ______________________________________________________________

The default repair of the Boot-Repair utility would not act on the boot.

sprunge.us ko ()
paste.ubuntu.com ko ()

Hi and welcome.

It looks like your system is set up with mbr and is conflicting with EFI which normally uses GPT partitioning, not mbr.

Are you dual-booting with Windows?
Could you give more information about make and model of your computer?

2 Likes

Which USB creation tool did you use?
Was the USB creation tool (e.g. Rufus) set to use MBR or GPT?
You need to use GPT for UEFI

4 Likes

Welcome to the Forum!

To add a Picture to the previous Comments. When using Rufus to create the bootable USB, You find the Option to choose between GPT (for UEFI BIOS) and MBR (for Legacy BIOS) here:

4 Likes