Lỗi grub2 không cài được linux mint

tình hình là mình có boot mint vào usb 8gb của mình ,cài vào laptop.khi cài đặt không thấy vấn đề gì cả ,sau đó nó bảo restart thì mình restart thì nó lại không vào được mà báo lỗi như dưới hình ạ 😔[
mọi người ai biết lỗi gì giúp mình với ạ 😆 mình cảm ơn [ảnh hơi mờ ạ ]

Ubuntu and many other Linux distributions use the GRUB2 boot loader. If GRUB2 breaks — for example, if you install Windows after installing Ubuntu or overwriteyour MBR — you won’t be able to boot into Ubuntu.You can easily restore GRUB2 from a Ubuntu live CD or USB drive. This processis different fromrestoring the legacy GRUB boot loader on older Linuxdistributions.

Graphical Method – Boot Repair

Boot Repair is a graphical tool that can repair GRUB2 with a single click. This isthe ideal solution to boot problems for most users.If you have the media you installed Ubuntu from, insert it into your computer andrestart. If you don’t,download a Ubuntu live CDand burn it to a disc or install it on a USB flash drive. You can also download adedicated Boot Repair live CD. After booting into the live Ubuntu environment, open a terminal from the Dash andrun the following commands to install Boot Repair:

sudo add-apt-repository ppa:yannubuntu/boot-repair

sudo apt-get update

sudo apt-get install -y boot-repair  boot-repair

The Boot Repair window will appear after you run the boot-repair command. After it scans your system, click the Recommended repair button to repair GRUB2 witha single click.You can also click the Advanced options header to customize GRUB2’s optionswithout learning its command-line syntax.

Restart your computer after using the Boot Repair tool. Ubuntu should boot upnormally.

Terminal Method

If you’d rather get your hands dirty, you can do this yourself from a terminal.You’ll need to boot from a live CD or USB drive, as in the graphical methodabove. Ensure the version of Ubuntu on the CD is the same as the version of Ubuntu installed on your computer — for example, if you have Ubuntu 12.04installed, ensure you use a Ubuntu 12.04 live CD.Open a terminal after booting into the live environment. Identify the partitionUbuntu is installed on using one of the following commands:sudo fdisk -lsudo blkidHere’s the output of both commands. In the fdisk -l command, the Ubuntu partitionis identified by the word Linux in the System column. In the blkid command, the partition is identified by its ext4 file system.

Run the following command to mount the Ubuntu partition at /mnt, replacing/dev/sdX#

with the device name of your Ubuntu partition from the abovecommands:

sudo mount /dev/sdX#/mnt

For example, use /dev/sda1

for the first partition of the first hard disk device.

Important: If you have a separate boot partition, skip the above command andmount the boot partition at /mnt/boot. If you don’t know whether you have aseparate boot partition, you probably don’t.Run the following command to reinstall grub from the live CD, replacing/dev/sdX with the device name of the hard disk above. Omit the number. For example, if you used /dev/sda1 above, use /dev/sda here.

sudo grub-install –boot-directory=/mnt/boot /dev/sdX

Restart your computer and Ubuntu should boot properly