Linux kernel headers just won't install

[Flávio Vivório Salles]

During fresh install Linux Kernel Headers won't install

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445.1
Date: Sat Sep 26 22:09:19 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz persistent file=/cdrom/preseed/ubuntu.seed quiet splash ---
LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Flávio Vivório Salles (flaviovivorio)]

I was trying to install the 20.04.1 LTS, last week I installed the 20.04 LTS version on a similar laptop (also Lenovo Ideapad) and it worked very well. The 20.04.1 is not finding Windows 10 in a separate partition. I guess is a bug on 20.04.1.