Dual Boot Windows 10 with Ubuntu no grub

Hello, trying to dual boot Windows 10 and Ubuntu,

I have read several posts and tried several things and no matter what I do, it boots windows 10 every time.

The only way I can get it to go to Ubuntu is to hold down F12 while powering on, then I get an option to start:

Windows Boot Manager
ubuntu
ubuntu

if I choose ubuntu, then it goes to Grub. I want to start Ubuntu by default and have the option to choose Windows 10 and I dont want to have to press F12 every time.

I have tried "Boot Repair Disk", I have tried rEFInd, and I even tried "EasyUEFI" for Windows.

I read somewhere that Lenovo has a bug that it will only load a boot manager if it is named "Windows Boot Manager" or "Red Hat Enterprise Linux", even tried renaming them...still goes in to Windows with no option to choose anything else.

From Windows, I go to where you can set default operating system and Windows is the only option.

Computer is the Lenovo H30, I picked it up as a spare computer to play with, thought I would try dual booting...thinking that wasn't a good idea, because I am totally frustrated now.

Wouldnt be so bad if I had to press F12 to get to Windows, but I want Ubuntu to start by default without having to press a bunch of keys to get to it.

I am new to the whole UEFI stuff, this is the first computer I have had with UEFI.Secure Boot is disabled and it is set to boot UEFI and not legacy...I dont know what else to try.

Hopefully someone can point me in the right direction.Let me know what to check and I will post the output here.

Thanks
Rick

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Dual Boot Windows 10 with Ubuntu no grub