GWX.EXE - api-ms-win-core-heap-l2-1-0.dll missing

Hairy Scot

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Hi,
I set up a dual boot Windows 8 & 10 system by initially setting up a dual boot with two Win 8.1 systems and then upgrading one to Windows 10.
Now I find that the Win 8.1 system fails at start-up with a message from GWX.EXE:-
"api-ms-win-core-heap-l2-1-0.dll missing"
And that's as far as it goes. I've tried a number of dodges but there is just no way I can get into the 8.1 system so it looks like none of the normal repair options are available.
I have tried the repair option from my 8.1 install disk but that takes me nowhere.
I also tried recovering the 8.1 system from a backup but the problem remains.
Since my Win 10 system can see the Win 8.1 disks, would it be possible to take advantage of that to fix the problem?

:sick:
 

My Computer

System One

  • OS
    Windows 8.1 Pro X64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Gigabyte Technology Co., Ltd. GA-B75M-D2V
    CPU
    Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz, 3601 Mhz, 4 Core(s)
    Motherboard
    Gigabyte Technology Co., Ltd. GA-B75M-D2V
    Memory
    8 GB DDR3 1600MHZ
    Graphics Card(s)
    GE Force GT 610
    Sound Card
    Onboard Realtek High Def
    Monitor(s) Displays
    Dell U2913WMP
    Screen Resolution
    2560x1080
    Hard Drives
    Western Digital WD10EZEX-00RKKA0 1TB
    Seagate ST2000DL003-9VT166 2TB
    Seagate ST31000528AS 1TB
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