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:
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.
Of note during the 16.04.1 install, I selected “Something Else”, and got this display:
Notice the 2 partitions named “unallocated”. These were not present for my previous setup, and the size of sda1 was 600 MiB and the size of sda2 was 300 MiB. All the other partitions shown above matched those of the previous Win 8.1 and Ubuntu 16.04 dual boot setup. I right-clicked each “unallocated” partition, but there were no options to resize. When I right-clicked sda1 or 2, I could resize, and this shrunk the following unallocated partition commensurately. When sda1 size is set at 600 MiB, the following unallocated partition disappears. Likewise for sda2. But when I got the warning that resizing could lose all data, I canceled the change. If I “apply” the resize operation, will the data in sda 1 and 2 be lost? And will the missing “Boot Configuration Data” (mentioned in the first pic) be recovered?
Also during the install I set the “Device for boot loader installation” to /dev/sda ATA……...”. Should I have set it to sda2?
Lastly, 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 first pic, at Win\Boot\DVD\EFI\BCD.
What should I try next?