I was new in Ubuntu OS and I was just trying to use wubi windows installer to get a Ubuntu first for hands-on.

I followed exactly the same as the instructions and after reboot win7, there is no Ubuntu selection in windows boot manager, with only Windows 7 showing there evilly -.-

What I've found out was that the grub folder inside Ubuntu folder ( in my C:\ drive) was empty, either inside the ubuntu\disks\grub or ubuntu\install\grub. I thought this might be the reason why I could not load ubuntu during startup.

Cause I've also looked into the EasyBCD settings, and ubuntu entry with Bootloader Path: \ubuntu\winboot\wubildr.mbr was lying there peacefully, looking perfectly fine. However it was not in boot loader actually.

Is there a way to restore the grub folder with grub2, or is there any way to fix this problem so that I can find the "Ubuntu" selection at windows startup?

Very appreciate your help :)


  • 1
    Please notice that wubi is no longer developed and no longer supported, because it does not work with the new versions of Windows that are installed in UEFI mode. See this link, ubuntuforums.org/showthread.php?t=2229766
    – sudodus
    Jan 11, 2017 at 8:52
  • You can try Ubuntu by downloading the ISO, transfer its content into a USB stick, rebooting into the USB stick and installing it. Ubuntu will resize your partition and establish a double boot with Windows automatically Dec 22, 2020 at 6:09

2 Answers 2


Run a live Ubuntu CD/USB.Mount the drive where you installed Ubuntu.Run terminal and type sudo update-grub and reboot.If you still stuck with grub issue,come back again to live,type this command sudo install-grub /dev/sda where sda is the drive where Ubuntu lies.Then sudo update-grub and reboot.More info here.


Grab a copy of wubildr (extract from wubi installer with 7zip) and copy to root (C:), together with your wubildr.mbr

You can add an entry with EasyBCD or, if you have grub, you can boot from the grub prompt by entering:

search --set=diskroot -f -n /ubuntu/disks/root.disk
probe --set=diskuuid -u $diskroot
linux /vmlinuz root=UUID=$diskuuid loop=/ubuntu/disks/root.disk ro quiet splash
initrd /initrd.img

Then run (once booted):

sudo update-grub

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