I have a problem similar to http://ubuntuforums.org/showthread.php?t=2023086
I have bought a new Acer laptop with UEFI support and Windows 8 pre-installed. After installing Ubuntu 12.10, I was able to start up, but I couldn't start Windows 8 anymore. I followed the instructions described here and ran Boot Repair. The result was that I was completely unable to start my laptop. I got the following error: "file '/grub/i386-pc/normal.mod' not found".
At the end of the procedure, Boot Repair displayed the message: "Please do not forget to make your BIOS boot on sda2/EFI/ubuntu/grubx64.efi file!" as you can read at http://paste.ubuntu.com/1494353. I don't understand how to do this. Any help would be greatly appreciated.
I have now re-installed Ubuntu. The original Windows 8 partition is still on my hard disk. I can now start Ubuntu again, but I still can't use Windows 8. Please help.