anemone42,

That explains a lot! Let's try again.

Before proceeding, I take it that you have already saved all your valuable personal data from the Windows installation to an external drive or elsewhere?

In BIOS, for UEFI Boot Mode, select Disabled. Save and Exit (F10).

Boot from GParted USB drive.

Delete all existing partitions. Click Apply.

Click on Device > Create Partition Table > Select msdos > Click Apply.

Click on Partition → Create new Partition:
Primary > New size: 25000 MiB - File system: ext4

Click on Partition → Create new Partition:
Primary > New size: 2000 MiB - File system: linux-swap

Click on Partition → Create new Partition:
Primary > New size: Remainder of drive - File system: ext4

Click on Apply and wait for process to end.

Close GParted, shut down the computer, remove the GParted Live media.

Connect to internet and boot from Ubuntu installation media, hopefully this time in Legacy (CSM) mode.

For Boot Menu, keep tapping the F12 key (or other) and then select the USB boot device.

Double click on Install Ubuntu.

When asked “What would you like to do?”, choose Something else > Continue.

Leave all the sizes the same. Select each partition:

Highlight the sda1 partition, click on Change > Primary partition > select Use as: root, Format the partition as ext 4 with root (/) as mount point > OK.

sda2 > Change > Primary, use as swap > OK.

sda3 > Change > Primary > use as /home > Format the partition as ext 4 > Select /home as mount point > OK.

Next, select sda and click on Install now.

Good luck.

I am pretty sure I have to include a bios area. New picture in the Google doc. I am not sure where to insert that in the procedure.

Also, I am not quite sure the numbers are right (sda2, sda3 etc.).

The windows install should go away, please.

anemone42,

In practice the actual installation numbers for the partitions may vary, don't worry about that.

That warning refers to using a UEFI installation on a GPT formatted drive.

You are now going to be using a Legacy (CSM) installation on a mbr (msdos) formatted drive, so the warning does not apply.

Click on Continue.

anemone42,

In the last screenshot there is /dev/sda1 shown as an efi partition of 524MB.

This should not be there because you are not using UEFI boot. You are using Legacy boot.

The other partitions are fine.

You must first use GParted to format the drive as as msdos to prepare for Legacy boot using mbr (BIOS).

UEFI boot must be disabled.

Reply to 16.

1) Used try ubuntu instead of gparted live.
2) Did not connect to Internet before install.

It works! It booted to ubuntu. Everything seems fine. This problem is solved. Thank you for the help.