[ubuntu] Cannot boot to Win 8.1 after installing Ubuntu 16.04.1

Here is my boot-repair report. I have not executed any boot-repairs yet, though:
http://ift.tt/2aDx6S0

Before installing Ubuntu 16.04.1, my PC (Acer Aspire XC-603/Aspire XC-603) was set up with a dual boot of Win 8.1 (pre-installed) and Ubuntu 16.04. The dual boot UEFI worked fine as I was able to select either Ubuntu or Win 8.1. After installing Ubuntu 16.04.1, I cannot boot to Win 8.1. The Grub menu is the same as before, but when I select “Windows Boot Manager”, I get the following display:

During the install I set the “Device for boot loader installation” to /dev/sda ATA……...”.

I have a usb memory stick with the Win 8.1 recovery files, but when I insert the stick and reboot, the computer does not recognize it (even though I have Removable Device as #1 boot priority) and goes right to the Grub menu. Strangely, after booting into Ubuntu 16.04.1, and launching Files, and then inserting the usb Win 8.1 recovery stick, Files will recognize the usb for a very short time, then not show anything in the usb port. However, if I insert the usb Win 8.1 recovery stick for another computer (Lenova), Files will detect it and show it. I don’t know why there is a difference as both sticks were OK before.

In Ubuntu Files I can open the Win 8.1 OS and all the folders and files appear. I did find the file “BCD”, shown in the above pic., at Win\Boot\DVD\EFI\BCD.

Any suggestions for what step(s) should be taken next will be appreciated.
TIA,
A4Skyhawk

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[ubuntu] Cannot boot to Win 8.1 after installing Ubuntu 16.04.1