I had window 10 on compaq laptop then I install ubuntu 12.04. After some days following message was showing in ubuntu 12.04.
then in ubuntu 12.04 I moved file from "\boot\efi" to another location. Moved files may be(I am not remembering clearly) "1. HP, 2. Microsoft, 3. Third I am not remembering". after that I reboot laptop then following message was showing " GNU GRUB version 1.99-21ubuntu3.19
Minimal BASH-like editing is supported. For the first word, TAB lists all possible command completions. Anywhere else TAB lists possible device or file completion.
If I go 'boot devices option' by f9 key then selecting 'boot from EFI File>NO Volume Label>EFI>Boot>bkpbootx64.efi' Following was showing [message]
then I make bootable usb with ubuntu 16.04 and ran boot repair commands i.e.
sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install -y boot-repair && boot-repair
then following message was shown
"GPT detected. please create a BIOS-Boot partition(>1MB, unformatted file system, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate/boot/efi partition:] option."
what to do