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0/2 trying to install Ubuntu alongside Windows10

So first off let me say I am a noob to Linux. I have built a few PCs before so I believed I had the ability and have researched this thing thoroughly before hand but I have struck out twice trying to install Ubuntu alongside Windows 10.

I have: 1 Tb NVMe (with windows 10), 1TB SSD (windows apps), 2TB HDD (Backups etc)

The first time I tried the “something else” method after making some free space of 200gb on my main windows drive. I used recommended partition sizes but I got a “fatal error” in grub during install and could no longer access Windows after. It was corrupted and I couldn’t get boot to recognize it. Reinstall was probably needed anyway so I formatted the drive and started over.

The second time the “install alongside windows 10” option was not available so I once again tried “something else”. This time I was prepared with a Windows image in case something went wrong again. It did. I had set up my partitions on the free space by only setting root, swap area and small EFI system partition. No other fancy stuff. The same thing happened and I had to reinstall Windows 10. Thank goodness for my restore image.

Now I don’t know if I’m a glutton for punishment or what but I want to try the install alongside windows 10 option to see if that will work but can’t get it to come up.

What am I doing wrong here!?

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1 Answers1

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OP here. For anyone having this same issue it was an problem with my version of Windows being in Legacy mode due to my drive somehow getting reformatted as MBR and not GPT during that first failed install. I then tried installing Ubuntu as UEFI which would not work. I had to change MBR to GPT (very simple!). It was a bit of a long road but this post solved my issue:

Getting a “No EFI System Partition” error when trying to dual boot install Ubuntu 20.04 on a computer with Windows 10 already installed

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