I don't have the .fd BIOS file, I have only isflash.bin file extracted from .exe from Acer site by method from the video I have posted before, there were no .fd files in the extracted directory. I do not know if this .bin file is the BIOS image, but if we are still looking for the .fd file I would ask you for advice how to get it.

I do not own any Hynix NVMe SSD :) The only disc in this laptop is Western Digital HDD. It does have SSD M.2 port but it is empty so far.

@MattSwindleTips:
I have replaced bootmgfw.efi from Win10 as \efi\boot\bootx64.efi. No 0xc000000d anymore, but now the installation freezes at the beginning, on "Starting Windows".

Yes, It seems unnecessarly complicated to install Win7 on this laptop. It only makes me more determined to succeed!

@Salamandra Follow this guide here to disable VGA.sys which is what the problem is reboot.pro/topic/21108-install-windows-7-at-uefi-graphics-output-protocol-gop-hardware/

Please note that you will need the inf file from your Intel HD Graphics installer to replace it.

@Salamandra Triumph! I have gotten Windows 7 to boot in full native UEFI without CSM. What I meant by semi-boot is that the OS would boot, however I would not see anything on the screen but I could hear the sounds. I have just gotten it to boot with no CSM and video out works. I can now confirm that the guide I linked you to in my last post DOES work fully. I can boot without the BCD error or freezing at the Windows start screen.

Here is what you need to do with the Intel driver:
1. Download the appropriate one from Intel
2. Extract it and find the file named igdlh64.inf (I found it under the Graphics sub-folder of my Intel driver download), copy the driver folder to a Windows install USB in a driver folder and write down the path to the inf file.
3. Replace the bootmgfw.efi file on the USB with the one from Windows 10
That is the file you will need to use in the article I linked to you. Follow those directions and you should be good to go.
Hope this helps,

- Matt

@MattSwindleTips:

Thanks a lot for your message and I'm glad about your triumph!
However, I'm still unable to install Windows 7.

I will share with you the details of what I've done:

1. I've downloaded drivers from Acer site with the igdlh64.inf inside. I've copied the whole directory to the USB drive with my modified Win7 image (inc. USB 3.0 and AHCI drivers (installed on the Win7 image by NTLite) and with bootmgfw.efi from Win10);
2. I've made bootable USB drive with Win10 WinPE by Windows ADK on Windows 10 installed on this computer;
3. I've booted WinPE and followed the procedure from your link (the first post at: http://reboot.pro/topic/21108-install-wi...l-gop-hardware/). At this point I had two USB drives plugged to the USB 2.0 ports - one with WinPE and the other with Win7 + drivers. I've corrected the path for the igdlh64.inf and Win7 image install.wim. Every single operation went without any errors;
3. I've typed 'exit' in the WinPE console and tried to boot.

Trying to boot from Win7 installation USB drive freezes at "Starting Windows" and booting from the HDD leads to my favorite 0xc000000d BCD error.

I had to take some time with the instruction linked by you and I still don't fully understand it. Should I be able to boot Win7 from the HDD after all steps?

Well in order to get past the issue with the freezing, you have to do the part of the guide where you disable vga.sys, because that is what is causing the freeing issue.

Run these lines of code in CMD targeted AT YOUR USB DRIVE so you can make sure that it isn't anything else being applied. Replace all instances of W:\ with your USB Drive's letter.
Be aware that it is very possible that you have to do this within an existing windows installation and target it at a USB from there rather than booting into the USB itself.

ren W:\windows\system32\drivers\vga.sys *.off
set Services=HKLM\loaded_SYSTEM\ControlSet001\Services
reg.exe load HKLM\loaded_SYSTEM W:\Windows\system32\config\system
reg.exe add "%Services%\Vga" /f /t REG_DWORD /v "Start" /d 4
reg.exe add "%Services%\VgaSave" /f /t REG_DWORD /v "Start" /d 4
reg.exe unload HKLM\loaded_SYSTEM

Also this too, but replacing S:\ with your USB letter:
bcdedit.exe /store S:\efi\Microsoft\boot\bcd /set {default} bootlog yes
bcdedit.exe /store S:\efi\Microsoft\boot\bcd /set {default} bootstatuspolicy IgnoreAllFailures
bcdedit.exe /store S:\efi\Microsoft\boot\bcd /set {default} novesa on
bcdedit.exe /store S:\efi\Microsoft\boot\bcd /set {default} quietboot on
The reason why your Hard Drive boot doesn't work is because you haven't yet replaced that boot efi file with the one from Win10. You should probably do that from your installation USB.

It is also important to note that you will have to do that code for your hard drive's OS as well.
Good luck,

- Matt

@MattSwindleTips: I still don't get it.
How should I target my USB drive containing win7 installation image with:

"ren W:\windows\system32\drivers\vga.sys *.off
set Services=HKLM\loaded_SYSTEM\ControlSet001\Services
reg.exe load HKLM\loaded_SYSTEM W:\Windows\system32\config\system
reg.exe add "%Services%\Vga" /f /t REG_DWORD /v "Start" /d 4
reg.exe add "%Services%\VgaSave" /f /t REG_DWORD /v "Start" /d 4
reg.exe unload HKLM\loaded_SYSTEM"

when there is no "Windows\system32\..." on it?
For me it only makes sense to target the HDD where I want to install Win7 with this instructions, and that's what I did.
I have also replaced "\efi\bootbootx64.efi" with Win10 "\1\Windows\Boot\EFI\bootmgfw.efi" on my Win7 installation USB drive.

EDIT: I've tried the same procedure with another Win7 iso copy. When I'm simply trying to boot Win7 installer I can see now the Windows logo image at the point "Starting Windows", where it freezes, but I'm unable to perform "DISM.exe /Apply-Image /ImageFile:D:\W7_x64\sources\install.wim /Index:2 /ApplyDir:W:\", I get error 87 (incorrect parameter).

EDIT 2: I would be also quite happy to install my Win7 in Legacy mode, but when I try to do this (with MBR USB by Rufus) I get "pxe-e61" error. In case I use external USB DVD drive with Win7 iso on the DVD the installation starts, but after language selection I see: “A required CD/DVD drive device driver is missing (...)", or something like that.

EDIT 3: Please, do not leave me with Windows 10. I'm sure that it can be done.

Small success! I've installed Windows 7 in Legacy mode.
My problem with the Legacy mode installation attempts was that Rufus changed my desired MBR partitioning scheme to UEFI GPT after selecting the desired .iso file. The following configuration works just fine: MBR partitioning for BIOS or UEFI-CSM and NTFS file system. The partitioning scheme option needs be checked again after selection of .iso file. It is also crucial to include USB 3.0 drivers, it doesn't matter if you plug your USB drive into the USB 3.0 or 2.0 port. I used Windows 7 USB 3.0 Creator Utility by Intel for this operation.
I'm still trying to install Win7 using UEFI.

EDIT:
Even though I have used USB bootable drive to install this OS, after the completion of the installation Win7 was unable to recognize any device plugged into the USB 2.0 or 3.0 ports. The solution was to include RSTe AHCI & RAID v15.7.6.1027 and Intel USB 3.0 drivers downloaded with Intel USB 3.0 Creator Utility manually, using appropriate *.inf files and NTLite. Maybe there is no need to include both of those two drivers but I haven't tested it.

Some conclusions on my Win7 UEFI installation attempts:

1) Replacing bootmgfw.efi from Win10 install.wim (\1\Windows\Boot\EFI) as \efi\boot\bootx64.efi fixes the EFI\Microsoft\Boot\BCD error when trying to boot USB drive with Win7 (UEFI), but now the installation freezes at "Starting Windows";
2) Replacing boot.wim and setup.exe from Win10 image (\Sources) fixes the freezing "Starting Windows" problem. Now I can perform whole installation of Win7 with the Win10 installer, but after the restart required at the end of the installation freshly installed Win7 won't boot (EFI\Microsoft\Boot\BCD error again).

@Fernando
I have a feeling that "Enable Legacy Option ROMs" is an option that could solve this problem, but I don't have it in my BIOS setup, even with the supervisor password enabled. I have tried updating my BIOS (by .exe from Acer site on a temporally installed Win10) (v. 1.06 -> v. 1.15) but it changes nothing.

@Fernando:
I found this as a working solution in many of the reports about this EFI\Microsoft\Boot\BCD error with UEFI Win7 installation.
Here are some examples, there is much more:
https://social.technet.microsoft.com/For...onfigmanagerosd (first answer)
https://www.youtube.com/watch?v=3bCLZuPsVPo (second comment)

OK, I am done here :)
I'll stick to Legacy, everything works perfect!
Thank you both, @Fernando and @MattSwindleTips for all help!