I followed the procedure mentioned at Installing Ubuntu Alongside a Pre-Installed Windows with UEFI on toshiba satellite laptop.
also tried the boot-repair and logs @ http://paste.ubuntu.com/6327398/
Its not booting to windows as well as ubuntu. It goes to grub command prompt.
When on initial screen it briefly shows error message as failed to open /efi/Microsoft/boot/grubx64.
Please advise.
EDIT : Secure boot in on and boot mode is UEFI Boot
The error message refers to /efi/Microsoft/Boot/grub64.efi (I presume there was a efi after the dot there, although your message didn't say so.) This implies that shim is installed in /efi/Microsoft/Boot, presumably as bootmgfw.efi, and is being launched; however, your Boot Repair output shows no evidence of grubx64.efi being present there, as it must be. (Shim is hard-coded to launch grubx64.efi from the same directory in which it resides.)
This suggests an easy solution: Copy grubx64.efi from /efi/ubuntu to /efi/Microsoft/boot. You'll need to use an emergency disc and mount /dev/sda2 somewhere convenient to do this copy, of course.
