I installed 14.04.3x64 LTS on hd1 with Win10 existing on hd0, using a live USB. No secure boot, no BIOS only UEFI options were selected from boot options firmware on HP desktop.
My intentions were to install Ubuntu make sure both OS would load then go back and set up rEFInd in the /boot/efi/EFI/refind directory of the new Ubuntu install, as I have on my laptop.
Ubuntu worked great, I updated played around with it then rebooted into Windows. Windoze worked and then ... Opps! When rebooting the Win boot menu gave me the option of Win and Ubuntu. On selecting Ubuntu it could not find Grub2 or the windows boot.
Went back to the live USB stick and installed the Boot Repair utility and posted the boot-info results at pastebin URL: http://Paste.Ubuntu.com/14524321/
The boot utility indicated that there was no MBR on sda or sdb. My understanding was the I would only require an efi partition and Ubuntu boot would have an EFI section.
I am confused on how to proceed. The utility says use diskpart and create MBR partition 150 - 250 MB and the utility tool would place Grub2 here then Ubuntu would boot.
I think if I can get Ubuntu to boot back up from sdb2 from the efi boot order I have set in my firmware menu I could set up rEFInd in Ubuntu boot as documented on the refind web documents. After doing this I would be able to choose the efi boot system it detected which should include Win 10.
The only access I have now to the drives are through the Try Ubuntu drive on /dev/sdc.
Thanks for any suggestions.