Unable to boot from Kyhi's boot USB

Page 1 of 2 12 LastLast

  1. Posts : 225
    Win 10 Pro 21H2 (OS Build 19044.1766)
       #1

    Unable to boot from Kyhi's boot USB


    Some time ago I created a number of bootable USB drives for diagnostic, recovery, etc. purposes. These include Kyhi, Hiren, Macrium.

    Wanted to run Memtest86+ so tried to boot from Kyhi, nothing, the USB drive just sat there with the LED gently pulsing away for 10 minutes until I gave up. Tried Hiren, worked immediately.

    Thought perhaps the Kyhi had got corrupted so recreated it. Still no joy.

    Reformatted the USB drive and recreated. Still no joy.

    Got a brand new USB stick and tried with that. Still no joy.

    I created the drive with Rufus 3.1 and am wondering if I have the options wrong.

    I took the defaults. These were:
    use an ISO image: winpese-x64-14393_17.01.16.iso
    Partition scheme: GPT - the alternative was MBR
    Target system: UEFI (non CSM) - no alternative listed
    File system: FAT32
    Cluster size: 8192 bytes

    Is there any way of determining whether these are correct, such as looking at, say, the Hiren's drive and seeing how that is set up?

    I wonder whether I should have used MBR. I notice if I select MBR the Target system changes to BIOS (or UEFI-CSM)

    Thoughts would be appreciated.
      My Computers


  2. Posts : 39,994
    windows 10 professional version 1607 build 14393.969 64 bit
       #2

    See these links:

    Boot from USB Drive on Windows 10 PC

    If you have fast boot or ultra fast boot enabled in your UEFI firmware settings, then you will need to temporarily disable fast boot or ultra fast boot to be able to boot from a USB.
    How to Enable Fast Boot or Ultra Fast Boot in UEFI Firmware Settings for Windows: Enable or Disable Fast Boot in UEFI Firmware Settings for Windows
      My Computer


  3. Posts : 225
    Win 10 Pro 21H2 (OS Build 19044.1766)
    Thread Starter
       #3

    Thanks for that swift reply, some food for thought.

    Though as the Hiren and Macrium USB drives boot OK, and as far as I can recall were created at the same time, it seems odd that Khyi USB drive fails to boot.
      My Computers


  4. Posts : 39,994
    windows 10 professional version 1607 build 14393.969 64 bit
       #4

    Code:
    diskpart
    list disk
    select disk # <- replace # with the disk number of the usb flash drive
    clean <- this will erase the flash drive
    create part pri
    format fs=fat32 quick
    active
    assign
    exit
    exit
      My Computer


  5. Posts : 225
    Win 10 Pro 21H2 (OS Build 19044.1766)
    Thread Starter
       #5

    Thanks. Did that. The "active" command failed

    The selected disc is not a fixed MBR disk.
    The ACTIVE command can only be used on fixed MBR disks
      My Computers


  6. Posts : 4,071
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #6

    The USB drive is probably GPT. You must convert to MBR to be able to boot as Legacy.

    1
    Follow the steps below

    2
    Connect the USB flash drive.

    3
    Open an elevated command prompt.

    4
    Type diskpart into the elevated command prompt, and press Enter.

    5
    Type list disk into the elevated command prompt, press Enter, and make note of the Disk ### (ex: 4) for the USB flash drive

    6
    Type select disk # into the elevated command prompt, and press Enter.


    Substitute # in the command above with the actual Disk ### (ex: 4) for the USB flash drive.

    For example: select disk 4

    7
    Type clean into the elevated command prompt, and press Enter.

    8
    Type convert mbr into the elevated command prompt, and press Enter.

    9
    Type create partition primary into the elevated command prompt, and press Enter.

    10
    Type format fs=fat32 quick into the elevated command prompt, and press Enter.

    11
    Type active into the elevated command prompt, and press Enter.

    12
    Type assign into the elevated command prompt, and press Enter.

    13
    You can now close the elevated command prompt.

    14
    Mount the Kyhi's Iso and copy all files and folders to the root (\) of the USB drive
    Last edited by Megahertz; 24 Jun 2020 at 15:07.
      My Computers


  7. Posts : 39,994
    windows 10 professional version 1607 build 14393.969 64 bit
       #7

    If the flash drive is MBR with a FAT32 partition marked as active it will be universally bootable in legacy BIOS, UEFI and UEFI in CSM modes.

    Unless it was recently changed Rufus does not have the FAT32 option, just NTFS.
      My Computer


  8. Posts : 225
    Win 10 Pro 21H2 (OS Build 19044.1766)
    Thread Starter
       #8

    Thanks to you both.

    I followed Megahertz instructions and, apart from having to change the default program for .iso as I wasn't offered Mount in the context menu, it all worked.

    Double checked, Rufus 3.1 which I downloaded in July 2018 offers both FAT32 & NTFS, with FAT32 as the default.

    I'll mark this as solved.

    Thank you both. As someone put it to me recently "every day is a school day", learning something new.
      My Computers


  9. Posts : 39,994
    windows 10 professional version 1607 build 14393.969 64 bit
       #9

    Nice.
    You're welcome.
    So the operating system is working well and the boot rescue is to create the tool in case it's needed in the future?
      My Computer


  10. Posts : 225
    Win 10 Pro 21H2 (OS Build 19044.1766)
    Thread Starter
       #10

    I'm comfortable tat the OS seems to be running sweetly - at the moment... though I may have a hardware problem mentioned in another thread

    I prefer to be prepared - just in case!
      My Computers


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 23:30.
Find Us




Windows 10 Forums