Unable to install GRUB in /dev/sda

[hamdhantys]

I was trying to install Ubuntu Studio 19.10 alongside Windows 10 on my 'hp notebook 15' . In the end the error in the image shows up.

Now I can't even start my windows.

Please help!!!

[dmnur]

Boot the installation media, open a terminal window and type the following command:

sudo fdisk -l

Then show the output of the command.

[Impavidus]

Bios/legacy mode or UEFI mode? You can't mix them.

If you install Boot-Repair (https://help.ubuntu.com/community/Boot-Repair) in your live session, you can create a boot info summary with a lot of information for us to help you.