Windows 10: Cant install 64bit only allows 32bit

  1.    07 Aug 2015 #1

    Cant install 64bit only allows 32bit


    I have a slight issue.

    I have downloaded Windows 10 and created multiple USB's using Rufus/Windows7 USB Tool/Even The Win 10 Creation tool, however everything time I try to install using UEFI the USB drive is never detected therefore it can't boot. I change it to legacy and it does boot and will only install the 32bit version...

    I have downloaded the 64bit image only numerous times, created it with either with one of the above methods, even with Rufus settings correct, I can never install the 64bit version. As a test I did the same steps for Windows 8 media and it works fine under UEFI and install the 64bit version.

    UEFI is selected in my bios, secure boot is off (even tried it with it on) - Even burn them all to DVD to no avail.

    Has anyone else had issues doing a clean install with the 64bit media.

    PS I even install the 64bit version of 8 then tried to run the setup within the ISO of 4 different downloads of either both images and the 64bit only image but all state that I need to insert the 64bit media and setup can not install.

    Does anyone have any ideas??
      My ComputerSystem Spec

  2.    07 Aug 2015 #2

    Step One:

    Create a 64-bit Windows 8.1 USB flash drive and then clean install Windows 8.1 64-bit.

    How to download and clean install Windows 8.1 -> link

    Here is info about UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

    How do you select UEFI Boot Mode.

    The UEFI firmware settings determines what type of boot devices are available in the boot menu: UEFI, Legacy BIOS (aka CSM), or both types of boot devices.

    Normally, you do not need to turn Secure Boot off to install Windows 8/8.1/10 in UEFI Boot Mode. You only need to turn Secure Boot off to install Windows 7.

    You do not need to change the boot order of drives in your UEFI firmware settings.

    - Connect your Windows 8/10 64-bit USB flash drive (Note: FAT32 file system) or insert your Windows 8/10 64-bit DVD.
    - Restart the computer.
    - Press the correct key to enter the boot menu (Esc, F8, F9, F10, F11, F12).
    - Select to boot from the "UEFI: USB/DVD device name" (see screenshot below).



    Step Two:

    Create a 64-bit Windows 10 USB flash drive.

    Windows 10 Media Creation Tool

    Click image for larger version. 

Name:	Media Creation Tool 1.png 
Views:	2 
Size:	9.6 KB 
ID:	35011

    Step Three:

    To Upgrade to Windows 10 with USB Installation Media
    Last edited by genet; 31 Aug 2015 at 17:14. Reason: typo
      My ComputerSystem Spec


  3. Posts : 5,003
    Windows 10 Pro X64 15063.138
       07 Aug 2015 #3

    Did you use the 64 bit version of the MediaCreationTool?

    Your system is UEFI, is the drive GPT?

    Enter diskpart then list disk from a Elevated Command Prompt to see:

    Code:
    C:\Users\Owner>diskpart
    
    Microsoft DiskPart version 6.1.7601
    Copyright (C) 1999-2008 Microsoft Corporation.
    On computer: SHOP-WIN7
    
    DISKPART> list disk
    
      Disk ###  Status         Size     Free     Dyn  Gpt
      --------  -------------  -------  -------  ---  ---
      Disk 0    Online           74 GB  6144 KB
      Disk 1    Online           74 GB  1024 KB
      Disk 2    Online          465 GB  3072 KB
    
    DISKPART> exit
    
    Leaving DiskPart...
    As you can see, the computer I'm using is not GPT.
      My ComputersSystem Spec

  4.    07 Aug 2015 #4

    wesd84 said: View Post
    I have a slight issue.

    I have downloaded Windows 10 and created multiple USB's using Rufus/Windows7 USB Tool/Even The Win 10 Creation tool, however everything time I try to install using UEFI the USB drive is never detected therefore it can't boot. I change it to legacy and it does boot and will only install the 32bit version...

    I have downloaded the 64bit image only numerous times, created it with either with one of the above methods, even with Rufus settings correct, I can never install the 64bit version. As a test I did the same steps for Windows 8 media and it works fine under UEFI and install the 64bit version.

    UEFI is selected in my bios, secure boot is off (even tried it with it on) - Even burn them all to DVD to no avail.

    Has anyone else had issues doing a clean install with the 64bit media.

    PS I even install the 64bit version of 8 then tried to run the setup within the ISO of 4 different downloads of either both images and the 64bit only image but all state that I need to insert the 64bit media and setup can not install.

    Does anyone have any ideas??
    I can't guess what your problem might be.

    I have clean installed 10 Pro X64 from a USB flash drive. I prepared the drive by having the Media Creation Tool download/create the .iso. I set up the flash drive using diskpart (formatted FAT32). I mounted the .iso in Win 8.1 and copied its contents to the flash drive.

    In the clean install process, I deleted the partitions from the boot drive and let the Windows installer make new ones.

    I'm not sure how universal this is, but to do a UEFI install, the flash drive has to be FAT32. The drive also appears twice in the boot drive listings, and I have to be careful to select the UEFI one. (I don't really understand why.)
      My ComputerSystem Spec

  5.    07 Aug 2015 #5

    bobkn said: View Post
    The drive also appears twice in the boot drive listings, and I have to be careful to select the UEFI one. (I don't really understand why.)
    If you select Legacy BIOS Boot Mode (not marked UEFI in the boot menu).

    - If your hard drive is blank, the Windows setup program creates the following partitions on your hard drive (see screenshot below).

    Partition table:
    - MBR (Master Boot Record)

    Two partitions:
    - System Reserved - The Boot Configuration Data (BCD).
    - Primary - Where Windows is to be installed to.



    If you select UEFI Boot Mode (marked UEFI in the boot menu).

    - If your hard drive is blank, the Windows setup program creates the following partitions on your hard drive (see screenshot below).

    Partition table:
    - GPT (GUID Partition Table)

    Four partitions:
    - Recovery - The Windows Recovery Environment tools. This partition does not exist in Windows 7.
    - System (EFI system) - The Boot Configuration Data (BCD).
    - MSR (Reserved) - Microsoft Reserved.
    - Primary - Where Windows is to be installed to.

    Note: The MSR (Reserved) partition is not visible within Disk Management utility, but it is listed with command line utility (diskpart).

      My ComputerSystem Spec


  6. Posts : 8
    Windows 10 Home 64-Bit
       11 Oct 2015 #6

    Did you get the error as "Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only installed on GPT disks"?

    I encountered this before and resolved by converting the disk from MBR to GPT. I used gdisk and you can download from GPT fdisk download | SourceForge.net
    You should have a 32 bit OS running and just run this utility with an admin command prompt. After this conversion the 32 bit OS will not be usable but anyway you can clean install the 64 bit OS. Good thing about this utility is it convert MBR to GPT without data loss (for my case I have a data drive).
    Follow the steps:
    1. When prompted for type of device: \\.\physicaldrive#, where # is the disk number in Disk Management.
    2. Command (? for help): r, where r is recovery and transformation options (experts only).
    3. Type y for yes.
    4. Command (? for help): f, where f is load MBR and build fresh GPT from it.
    5. Type y for yes.
    6 Command (? for help): m, where m is return to main menu.
    7. Command (? for help): w, where w is write table to disk and exit.

    Windows will prompt a screen and wait for it to restart. The current 32 bit OS will become unusable and just install the 64 bit OS. You may have to delete the disk drive where you want to install the OS and then create a new one during the installation.

    Hope this helps.
      My ComputerSystem Spec


 

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