I have installed Ubuntu 12.04 earlier. I tried to install another Windows 8.1 OS HDD into my computer. The system made a boot menu automatically with Win 8.1 Entry, but it does not work. I get error messages:
error: unkonown command 'drivemap' error: invalid EFI file path
Boot-repair tells that I must create a new partition for boot, but there is no possibility to do it.
Boot-repair gave a log: