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I am trying to install Ubuntu 18.04 but I get this error at the end of installation process!

I tried to create a partition with ext4 for \boot. also ext1 but non of them worked. Also I tried to choose the ntfs partition that my Windows 10 grub file is in that but didn't work too.

I also had Ubuntu 16.04 beside my Windows 10 on this Laptop, But when I tried to format the old Linux and install the new one, I get this error message!

(My Windows is installed on sda (Samsung ssd hard))

Edit: Screen shot didn't work and couldn't large the window to show off all the partitions, so I took 2 images:

enter image description here enter image description here

user3486308
  • 731
  • https://askubuntu.com/questions/789998/16-04-new-installation-gives-grub-efi-amd64-signed-failed-installation-target You have not followed the instructions for installing uefi. See also https://help.ubuntu.com/community/UEFI#Creating_an_EFI_System_Partition "\boot" is NOT correct. It needs to be "/boot/efi". – Rinzwind May 29 '18 at 11:24
  • @Rinzwind: I read the link you put but couldn't exactly understand what it means? In the link it says if you have installed windows there is no need to create a EFI partition. But I tried it and didn't work – user3486308 May 29 '18 at 12:08
  • No. It says: if you already have a windows using efi...Because there should only 1 efi. Basically you need to create a /boot/efi partition of roughly 100Mb-500Mb unless you already have a /boot/efi from another operating system. And I do not see an efi label in your partition list.... so that is a legacy windows. – Rinzwind May 29 '18 at 12:15
  • @Rinzwind: I had Windows10 beside the ubuntu 16.04. I though maybe I had it before. So you say what should I do? I must delete sdb5 to sdb8 partitions, and first create a sdb5 with 300MB and EFI format, then create other ext4 and swap partitions again? – user3486308 May 29 '18 at 12:19
  • Why not use sdb8? Format to fat32 and mount as /boot/efi ? It does not need to be the 1st partition (legacy did need that). – Rinzwind May 29 '18 at 12:20
  • @Rinzwind: Is this a bad idea to change the sda1 format? I think it's made by windows10 when I installed – user3486308 May 29 '18 at 12:26
  • I created a new 500MB partion on sdb8 and changed to use as FAT32 filesystem. But in Mount point, it has only 2 options : /dos /windows – user3486308 May 29 '18 at 12:33

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