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Jerichouy's avatar
Jerichouy
Brass Contributor
Apr 12, 2026

Windows 11 10.0.22621.4317 refuses to boot after lubuntu 24.04.3 install

so basically i installed lubuntu 24.04.3 because i wanted to try linux for the first time

but now windows 11 refuses to boot after the install (i don't wanna do a clean install) even after a bios level(insydeh2o uefi) revert to factory default settings

by refuses to boot i mean sometimes it flashes "reset system" and then it reboots my entire laptop and then it straight up just goes to the ubuntu boot menu

upon clicking windows boot manager all it says is "bad shim signature"

but at least lubuntu is still bootable, what do i do?

laptop model HP Pavilion 14-bf060tx 10/28/2017, 8GB RAM, NVIDIA GeForce 940MX

SSD GIGABYTE GP-GSTFS31480GNTD

if you need anymore information then tell me in the comments

security

1 Reply

  • Eliseoiw's avatar
    Eliseoiw
    Brass Contributor
    Apr 14, 2026

    This is a very common issue when dual-booting Windows and Linux, and the good news is that your Windows installation is almost certainly still intact. The problem you're facing is a Secure Boot "signature" conflict, not a corrupted operating system.