I had faced this problem after i accidentally deleted the Ubuntu partition from windows. On the next start there came these lines
error: unknown filesystem.
grub rescue>
I searched the net on Ubuntu forums also tried the grub rescue commands but nothing seemed to help. Than i found out that boot-repair can help, so i did the following steps.
1.Created a bootable usb with Ubuntu 13.04 on it
2.Selected Legacy mode in BIOS setup.
3.Selected boot from external source.
4.After booting Installed Ubuntu
5.Installed boot-repair, the following lines should install it
6.Chose advanced option in boot-repair, i tried the recommended repair but it did not help, ticked the option containing the lines windows harcoded efi
7.After completing the boot-repair, got into BIOS setup and selected UEFI boot mode
8.I was successfully able to log back into windows alongside ubuntu installed and running, on UEFI mode.
I hope this helps.
grub rescue>
I searched the net on Ubuntu forums also tried the grub rescue commands but nothing seemed to help. Than i found out that boot-repair can help, so i did the following steps.
1.Created a bootable usb with Ubuntu 13.04 on it
2.Selected Legacy mode in BIOS setup.
3.Selected boot from external source.
4.After booting Installed Ubuntu
5.Installed boot-repair, the following lines should install it
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair
6.Chose advanced option in boot-repair, i tried the recommended repair but it did not help, ticked the option containing the lines windows harcoded efi
7.After completing the boot-repair, got into BIOS setup and selected UEFI boot mode
8.I was successfully able to log back into windows alongside ubuntu installed and running, on UEFI mode.
I hope this helps.
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