I had a dual booted system with Windows and Ubuntu. I wanted to remove Windows so I deleted all the Windows partitions (Even the System Reserve) which in retrospect I shouldn't have(?). So now when I try to boot I get the following message :
BootDevice Not Found. Please Install an Operating System on your Hard disk Hard Disk - (3F0)
When I ran
boot-repair I got:
The boot of your PC is in EFI mode, but no EFI partition was detected. You may want to retry after creating a EFI partition (FAT32, 100MB-250MB, start of the disk, boot flag)
What I am thinking now is to move the sda5 by around 200Mb and make an EFI partition there. Would that help?