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Safe to Install New Dual Boot?
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this post was submitted on 23 Aug 2024
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I looked at the breakdown, and I believe it's only changing the preference for same device.
It doesn't change the preferences but it does replace bootx64.efi which is the default bootloader executable for a drive, when the UEFI doesn't have more specific entries. In some configurations both Windows and GRUB want to be that.
If you add a boot entry for GRUB and don't point it to the default executable, then it won't be affected. Until you reset the BIOS or try to use the drive in another system that is, in which case the firmware will then only know about the default executable. But it's easy to add the boot entries back.
Yes, on the same device. If your BIOS specifically orders a different device as boot, this wouldn't matter, as in my original post.