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I was trying for hours to get Ubuntu to install as a dual boot alongside Windows 10, but kept running into this problem or this problem. I finally tried this solution, not knowing it would destroy my windows partitions. I can't boot to Windows now, but I can still access all of my Windows files through Ubuntu.

I don't have anything on Windows of importance except that it is a valid Windows install, which I'd rather not lose.

Several pictures that can provide some more information can be found here.

I was directed to try this solution, but none of the new boot options worked for me. Here are the logs from the boot-repair operation. One thing that I noticed is that some of the boot options will say:

error: no such device: 7A32-E897.
error: disk `hd1,gpt1' not found.

That device is the hard drive with the Windows files that I can access through Ubuntu's file explorer and disk manager.

If there is any way to make the Windows partition bootable again, how so? Thank you!

Rinzwind
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B. Freeman
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1 Answers1

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If you can boot Ubuntu open a terminal and type:

sudo update-grub

If you cannot boot into Windows via grub menu hold down shift key after MB Post. That will force display menu. There you can see windows boot option. If it does not work try to edit /etc/default/grub. There must be boot delay and show boot menu options. 

sudo gedit /etc/default/grub

If you can see boot menu and windows option but you can not boot try to press e and modify (hd0,msdos1) by changing numbers ieg: (hd3,msdos2)

If nothning improves try to boot into ubuntu and re-install grub via

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

change sda to your disk device link it may be sdb or sdc

If nothing changes then try boot recovery of windows install cd or usb and insert ubuntu install cd reinstall grub over it again with 

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

If it does not work either there may be something wrong with grub, uninstall it with configurations and reinstall it by 

sudo apt-get purge grub
sudo apt-get update
sudo apt-get install grub
sudo grub-install /dev/sda
sudo update-grub

If it fails try to reinstall both operating systems, windows first ubuntu second, changing disks to gpt instead of mbr (msdos in linux)... Sometimes grub with efi does not work with mbr ... It was a bug dont know current status.

Gediz GÜRSU
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