Dual Boot Setup HDD Not Visible During Drive Installation, need help in Drive selectionPHN16-71-972C

Abee
Abee Member Posts: 6 New User

I am planning to install Windows 10 Pro on my laptop by creating a dual boot setup while ensuring that Windows 11 continues to run smoothly. During the installation process via USB, I encounter an issue at the drive selection stage, where the drives are not appearing. Could anyone please assist with resolving this problem?

[Edited the thread to add model name to the title]

Answers

  • StevenGen
    StevenGen ACE Posts: 13,685 Trailblazer

    If you have an Acer product that came oem with Win-11 installed the Acer product is NOT designed to run Win-10 as the Win-10 OS has not got all the drivers required for your Acer Win-11 product and that is why you are having the driver(s) problems. DO NOT install Win-10 on a Win-11 Acer product, as that is the best advice that I can give you, as you will always have driver problems.

    If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful👍

  • Abee
    Abee Member Posts: 6 New User

    Dear Puraw,

    Thank you for sharing the tutorial. I was following the same steps, but I encountered an issue when I reached the drive selection stage—I couldn't find my drives to choose the path for installing Windows. Additionally, I'd like to mention that my Acer Predator Helios Neo 16 notebook came with Windows 11 Home pre-installed.

  • Abee
    Abee Member Posts: 6 New User

    Dear StevenGen,

    Thank you for your advice and explanation. I appreciate you sharing this information about the compatibility and driver issues with my Acer product. I'll take your suggestion into careful consideration before proceeding.

    Thanks again for your guidance!

  • billsey
    billsey ACE Posts: 35,805 Trailblazer

    For the drive selection stage to show the drives on an Intel based system, you need to manually install the IRST drivers. Often there is a zip file in the driver package that has all needed drivers and support files, just extract that to your Windows install flash drive, then navigate to the folder when installing the driver at that point of the install. Once the driver is loaded, the drive will appear.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.
  • Abee
    Abee Member Posts: 6 New User

    Dear billsey,

    Thank you for your earlier instructions. I followed the steps to manually install the IRST drivers, but the drives still didn’t appear during the installation process.
    I’ve been working on finding a solution, and I did come across one. However, when I tried it, it unfortunately caused my preinstalled Windows files to become corrupted, which I had to restore later.
    If you have any further advice or alternative approaches, I’d greatly appreciate your input.

  • billsey
    billsey ACE Posts: 35,805 Trailblazer

    What was the solution you came across? There shouldn't any issue with Windows corruption…

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  • Abee
    Abee Member Posts: 6 New User

    Here are the steps I followed: I had to disable the VMD Controller in the hidden BIOS settings. After rebooting and repeating the installation process, the HDD finally started appearing. However, I suspected it might cause issues with the preinstalled Windows 11 Home version. Before proceeding further, I exited the installation process and started my PC normally to let Windows 11 load. As expected, I encountered a blue screen error. From that point, I had to initiate the restore process to revert to a previous restore point."

  • billsey
    billsey ACE Posts: 35,805 Trailblazer

    Yes, disabling the VMD controller without using the tools in Windows to do so will often leave the system unstable. Disabling the VMD controller is a way to bypass the need for IRST drivers during install, but if the drive is configured with any of the IRST features it can cause that type of issue. There are utilities in the IRST package that allow you to turn on and off those features safely, but just bypassing that is the issue. You really don't want to just disable VMD without knowing if it was in use… You haven't yet told us what computer you have, so we can't easily go deeper into the user interface for setting IRST options, or whether you are going to run into issues with trying to run the older OS on it in the first place. Your full model number is usually on the same sticker as your serial number, it should look something like xxxxx-xxx-xxxx.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.
  • Abee
    Abee Member Posts: 6 New User

    Dear Billsey,
    Thank you for providing such detailed feedback. Your insights have clarified my doubts about the approach I was taking, and confirmed that it might not have been the best solution. Recognizing the potential risk of completely corrupting my old OS, I paused and attempted to mitigate the damage caused by disabling the VMD controller.
    As requested, here is the model number of my system: PHN16-71-972C, Acer PREDATOR HELIOS NEO 16.
    I look forward to your guidance on how I can properly resolve this issue and achieve a smooth installation of Windows 10 Pro, while ensuring Windows 11 continues to function seamlessly.
    Thank you once again for your help and expertise.
    Best regards,

  • billsey
    billsey ACE Posts: 35,805 Trailblazer
    edited March 29

    OK, first off Windows 10 is not supported on your PHN16-71, Intel never did chipset drivers for the old OS. That doesn't mean it won't work, but you do run the risk that any attempt to run W10 on it might do weird and bad things. You will have to use W10 drivers and I really don't know what the installation process will do when it tried to find drivers for the base chips.

    If you still want to try it, you have three choices, install the OS on a partition on the same drive as W11 is installed, drop a second drive into the system and install it there, or use a virtual machine to run Windows 10 Pro and put the VM on either the existing or a second drive. The VM route is the one most likely to work, since the hardware is abstracted behind the W11 chipset drivers.

    To install into a partition on the existing drive you have to free up space. Use Disk Management to shrink the C: partition to around half it's current size. I think you have a 1TB drive, so you would end up with around 500GB for each OS. That's not an ideal size, but certainly workable. When you use the installer for W10, you should be able to run it from W11 and choose that empty space as the destination without affecting your existing W11. If you instead choose to boot from the install flash drive, you will need to extract the IRST drivers to the install image and then load them when you get to the "where to install" prompt.

    The install on a second drive, just drop the second M.2 NVMe drive into the second SSD slot. The new drive will not show up as a driver letter, since it doesn't have a partition. You use the same process to do the W10 install, choosing the unallocated space on the second drive as the destination.

    To install into a VM you first need to verify that VTX is enabled in the BIOS, it should be by default:

    Then Depending on which version of W11 you have, either enable Hyper-V (Pro or Enterprise) or install a third party VM manager like Oracle VirtualBox (Home). Follow instructions there to start the install and place the VM files either in a folder on your C: drive, if using one drive, or place them on the second drive after creating a full size partition on it. Once the install is complete you can access Windows 10 Pro using either the VM manager or via something like RDP.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.