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I'm trying to dual-boot-install Lubuntu 20.04.1 through an USB drive created with Rufus on a PC which already has Windows 10 64bit installed on.

My SSD is GPT formatted, I have UEFI, but when I decide to manually install Ubuntu after creating an ext4 partition, I get this error box:enter image description here

But it's strange, because I already do have an EFI partition installed by Windows as you can see: enter image description here

enter image description here

So what should I do according to you? Thanks in advance!

Giacomo
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  • Boot to the Lubuntu USB and install/run boot-repair following the instructions found at https://help.ubuntu.com/community/Boot-Repair. Report back. Start comments to me with @heynnema or I'll miss them. – heynnema Sep 22 '20 at 21:19

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The solution was very easy: I only had to edit the mount point of the already-existing EFI partition (the first one) to '/boot/efi' (without even formatting it) through the Lubuntu installer.

Then the installation proceeded well and smoothly, with dual-boot working fine.

Giacomo
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