Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

Lenovo NotebooksLenovo P, Y and Z series Notebooks
All Forum Topics

4 Posts



6 Signins

59 Page Views

  • Posts: 4
  • Registered: ‎09-03-2017
  • Location: India
  • Views: 59
  • Message 1 of 1

Z51-70 - How to fix corrupted Boot loader

2018-05-04, 20:28 PM


I had Ubuntu 17 and Windows 10 dual booted in my Lenovo Z51-70 laptop. Due to some issues in Windows 10, I needed to reinstall it. So, I created a bootable Windows 10 USB stick from Ubuntu by installing WinUSB as mentioned here [1].

sudo add-apt-repository ppa:colingille/freshlight
sudo apt-get update
sudo apt-get install winusb

They warned that

installing WinUSB on EFI loaded Ubuntu will uninstall the grub-efi packages in order to install the grub-pc packages. It will make your system unbootable if you don't manually reinstall grub-efi package before rebooting.

I didn't notice it and forgot to run the below commands before rebooting the system

sudo update-grub
sudo grub-install /dev/sda
sudo update-grub
sudo reboot

Hence my bootloader got corrupted, I tried everything but I am unable to reinstall windows and ubuntu. I tried following things which didn't work

  1. tried installing windows by booting from USB stick and DVD
  2. tried disabling secure boot in Bios
  3. tried refreshing system

Below [2] are the series of errors that I am getting when the system starts. I am stuck with this error from past 4-5 days, Any help would be appreciated

[1] How can I create a Windows bootable USB stick using Ubuntu?

[2] https://postimg.cc/gallery/fqdd2mni/


Mod's Edit: System model added to the front of Subject line to improve visibility / clarity.

Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop





No, I don’t want to share ideas Yes, I agree to these terms