ubuntu - How to log into Windows if I have deleted the EFI partition?

I've run into a problem while experimenting.

1. I deleted my EFI partition while installing Ubuntu. I had Windows 8.1 pre-installed.


2. I installed Ubuntu 14.04 LTS.


3. Ubuntu runs fine. But there are no files of Windows on the EFI partition.


4. I need now to have Windows boot files in the EFI partition. So that I can also boot into Windows again.

What do I do?

Extra info: Running grub2 as boot-loader, don't wish to change that if not fully necessary; And of course, I must be able to dual-boot; I have the Windows recovery files on SSD, but they cannot be accessed, i.e. cannot use Windows recovery or refresh Windows.

HDD details: