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Installing Fedora and preserving Grub

I installed Fedora 24 3 times last year.

Each times, Fedora ended up overwriting previous Grub with its own without asking. I don't even know during which part of the installation it did that.

This was not supposed to create any problems, but on a multiple boot including a Windows installed with the UEFI (I didn't want that…), I wasn't able to access my Windows at all after that. kissanime

I want to install Fedora 25 but I want to be sure it will not reinstall its own Grub.

Can I have tips to avoid that?

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Installing Fedora and preserving Grub

I installed Fedora 24 3 times last year.

Each times, Fedora ended up overwriting previous Grub with its own without asking. I don't even know during which part of the installation it did that.

This was not supposed to create any problems, but on a multiple boot including a Windows installed with the UEFI (I didn't want that…), I wasn't able to access my Windows at all after that. kissanimethat.

I want to install Fedora 25 but I want to be sure it will not reinstall its own Grub.

Can I have tips to avoid that?