Public bug reported: >From what I can see, the original boot loader was not UEFI, it was legacy(not sure what that means). There are 3 primary partitions for windows and all Ubuntu was installed on an extended partition. I think the boot loader is the first primary partition that is 100 mb, but it is ntfs, not fat32 like efi partitions should be. Boot-repair doesn't work either.
ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: ubiquity 20.10.13 ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14 Uname: Linux 5.8.0-25-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu50 Architecture: amd64 CasperMD5CheckResult: pass CasperVersion: 1.455 Date: Sun Feb 28 21:40:12 2021 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash --- LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022) RebootRequiredPkgs: linux-image-5.8.0-25-generic linux-base SourcePackage: grub-installer UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: grub-installer (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug groovy ubiquity-20.10.13 ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917278 Title: Unable to reinstall grub. Started with Windows 7. Installed Ubuntu 20.04 to dual boot. Upgraded to Windows 10. Got new monitor, did not recognize Ubuntu install. Reinstalled Ubuntu. Nothing works. Post here. Cry in corner. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1917278/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs