Restore grub after Windows 11 installation

Installing Zorin OS
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1

I have two SSDs, while on one Zorin OS is installed and on the other one Windows 11 was installed. I installed Windows 11 first and then Zorin OS.

However, today I reinstalled Windows 11 and now the Grub bootloader is gone. In BIOS I don't even find Zorin OS in the boot menu, so I can't boot into Zorin OS. It seems that the Windows 11 installer abused the SSD where Zorin OS is installed for the Windows Bootloader (without asking before of course).

How can I restore the Grub bootloader?

2

When you install Windows after Zorin as far as I know it is possible that Windows will overwrite the Zorin Boot Loader.

A Way, you could try, is to create a bootable USB Stick with Zorin on it, start it and run it in the Try Mode. There look for the Program ''Boot Repair'' and run it. It can hopefully repair it.

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3

You're right, that worked!

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