Windows 8 won't boot via GRUB after installing Ubuntu with boot-repair
I had this problem after installing Ubuntu 14.04 alongside windows 8.1 on my nice new lenovo thinkpad t540p laptop.
However, all I had to do was disable the secure boot option in the bios. Having done that, the grub menu allows me to boot either Ubuntu or Windows from the options.
I did not need to do anything else.
You can try this:
- Run Boot-Repair -->
Advanced Options--> tickRestore EFI backups--> Apply. - Then in your BIOS, in the Boot order menu, select the
Windowsentry. It should boot Windows. To boot Ubuntu, you then need to select theUbuntuentry in your BIOS.