Windows 10: Bootable Windows install USB devices UEFI

Discus and support Bootable Windows install USB devices UEFI in Windows 10 Installation and Upgrade to solve the problem; Hi there there's definitely a problem on some older computers with UEFI boot if the iso file is > than 4.5 GB. Up to that the file system is FAT32 and... Discussion in 'Windows 10 Installation and Upgrade' started by jimbo45, Jun 14, 2021.

  1. jimbo45 Win User

    Bootable Windows install USB devices UEFI


    Hi there there's definitely a problem on some older computers with UEFI boot if the iso file is > than 4.5 GB. Up to that the file system is FAT32 and computers will boot OK. If greater than that then NTFS appears to be forced and some computers won't boot . I think the absolute limit is in fact the current Windows iso created by the mct which has a size of 4.463,295 KB which boots OK. If the iso is any bigger I think somewhow you need to split the install.wim and mess around with it that way. Shouldn't be a problem on modern machines but we aren't always running the latest hardware. Running as a VM and restoring back to a physical machine using Macrium and attempting to fix the boot problems won't work either in some machines as the bootloader will be the new NTFS/EFI one which will fail probably with message "Inacessible boot device" or something similar. As a VM the bootloader is different of course !!! so the VM will boot regardless. So if you can't install or keep getting boot failures this could be the cause. Cheers jimbo

    :)
     
    jimbo45, Jun 14, 2021
    #1
  2. Agility Win User

    Multi-bootable USB

    Hey guys from TPU, couldn't find any specific thread pertaining to the question asked on title. As mentioned, I'm trying to create a bootable USB, but with many specifics boots available.

    I've been trying to create one with multiple boot device including one that enables me to run Windows 10 directly on the USB Thumb Drive but to no avail.

    The list of bootable images i'm trying to create are

    1. Windows 10 (A full OS running from thumb drive)
    2. Windows 10 ISO (Bootable disk image for fresh install)
    3. MemTest86+

    Have tried YUMI or UUI from the website USB PenDrive Linux but as this is my first time, i don't know how am i screwing up or am doing it right.. Anyone got a rough idea on a step by step guide? Thanks!
     
    Agility, Jun 14, 2021
    #2
  3. Install Windows 10 using UEFI bootable USB thumb drive

    You need to go into you system bios and select allow uefi usb drive. Then add the UEFI usb drive to the boot menu

    better way to partition aand create an bootable usb.

    For the UEFI system, we can use these steps to create the bootable USB:

    1.Locate a 4GB or larger USB flash drive

    2.Open Diskpart and run the following command cmd admin type diskpart

    • Type DiskPart in the command prompt.
    • Type "List Disk” (make note of the disk number of the target USB drive).
    • Type "Select Disk X”, where X is the target USB drive noted in step 4.
    • Type "Clean”.
    • Type "Create Partition Primary”.
    • Type "format FS=fat32 quick”.
    • Type "Active”.
    • Type "Assign".
    • Type "Exit".

    Copy your ISO files to the drive and reboot

    never use UEFI it better to repartition and remove UEFI go with legacy bois
     
    bfvetscolakid, Jun 14, 2021
    #3
  4. Bootable Windows install USB devices UEFI

    Trouble installing windows 7 on RAID in UEFI

    As the title says, I'm trying to install Windows on a RAID array in uefi on my Maximus V Formula. When using legacy ROM I can install just fine but I go into CSM and change settings to UEFI only, I can build the array in the UEFI Raid driver (IRST tab in "BIOS") but the array does not show up in the boot menu and when I try to install windows (boot from UEFI DVD drive), The drive does not show up in the Windows install. The next thing I tried was to enable UEFI and legacy oprom in CSM, boot from UEFI DVD drive and install to the RAID array (probably detected by legacy oprom) and it will install. After first reboot, Windows Boot manager will show up as an option in the BIOS boot menu so I set that as first boot device and reboot. I will get to the starting windows screen and then BSOD (too quick to get codes) The last thing I tried was Changing to legacy mode and installing windows to a different drive. once installed, I initialized the Raid array as GPT and rebooted, changed csm back to UEFI only but they RAID array still doesn't show in the boot device list so I repeated the earlier process hoping that It might work because I had initialized as GPT but it still BSODs on starting windows screen. Any help or suggestions would be greatly appreciated
     
    mystiksinner, Jun 14, 2021
    #4
Thema:

Bootable Windows install USB devices UEFI

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