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Win 7 Ubuntu 18.04 dual boot UEFI

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Soooo... let's go. Win7 has run out of support and I'm pulling the plug on the OS.

I've been trying to install Ubuntu alongside my Win7 install for quite some time (months), unsuccessfully until now. Every time I install I boot from a live USB stick, install goes flawlesslly, but when rebooting it dives directly into Win7.

After pressing ESC key on boot, the only bootable OS showing up is Win7.

My BIOS is set to boot in EFI mode. So I burned an ISO image using GPT EFI. USB boots OK, but normally the machine boots directly into windows. Also tried an ISO image burnt in MBR and BIOS/EFI using Rufus. No luck.

There is no option in the BIOS to select which OS to boot first.

There is no Secure Boot or Fast Boot option either in BIOS or Windows.

I thoroughly read all of what I could find regarding UEFI and dual boot. As far as I can see, my copy of Win7 boots in EFI mode, thus Ubuntu should do the same.

Installed Boot-Repair, but before running a black box process (at least to me) I prefer to seek some advice. So I have not tried repairing the boot loader.

My partition info shows an EFI system partition 260Mb in size.

Attached is the result of the Boot-Repair's Bootinfo Summary

http://paste.ubuntu.com/p/GpkfQVCfTn/

Appreciate any insights this forum can give me.

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