YUMI (Your USB Multiboot Installer) is a Multiboot USB Boot Creator that can be used to make a Multisystem flash drive. This tool can quickly create a Multiboot bootable USB flash drive containing several different ISO files. Use it to boot from USB your favorite Live Linux portable Operating Systems, Linux and Windows Installers, antivirus utilities, disc cloning, backup, penetration testing, diagnostic tools, and much more. This Universal tool makes it easy for anyone to create their own customized multi purpose Bootable USB.
The YUMI App has been considered by many to be the Best Bootable USB Creator. It replaces our old Multiboot ISOS tool and is also the successor to the singular Universal USB Installer (UUI). Tools that were amongst the first ever made for the purpose of creating a bootable flash drive. For the most part, files are generally stored within the Multiboot folder. This makes for a nicely organized Portable Multiboot Drive that can still be used for traditional storage purposes.
Though originally intended to be used to boot various “LIVE Linux” Operating Systems and tools, using it to install Linux from a flash drive to a hard drive should work fine with most distributions. If you do happen to find a distribution where the installer does not work, please let me know. You can also use the software to create Bootable Windows Installers, enabling you to easily Install Windows 10 from USB.
YUMI Multiboot Bootable USB Flash Drive Creation
This tool works much like Universal USB Installer, except instead of imaging a single ISO to USB, it can be used to store and run more than one distribution from your thumb drive. Enabling you to Boot Multiple ISO files from the same device. Distributions can also easily be uninstalled or removed with the tool!
NOTE: I know you are probably asking, How can you boot from exFAT USB? A YUMI exFAT USB Boot variant is now available and recommended. It can be used to automatically create an exFAT boot USB. Here are the key differences between the variants:
- YUMI exFAT supports exFAT format & 4GB+ files. BIOS and UEFI USB boot.
- YUMI Legacy supports either NTFS or Fat32 format. BIOS USB boot only.
- YUMI UEFI supports Fat32 only. BIOS and UEFI USB booting (Distro dependent).
YUMI exFAT (BIOS and UEFI USB Boot)
Use this version if you want to keep using an exFAT format on your USB drive and also plan to store files larger than 4GB. It supports both modern UEFI and Legacy BIOS boot modes. Included is a separate USB Boot creation tool that was derived from Ventoy/Ventoy2Disk. This variant is also backwards compatible with Ventoy. If you’d like, you can even copy YUMI-exFAT-184.108.40.206.exe to the same location as a Ventoy2Disk.exe and use the YUMI-exFAT-220.127.116.11.exe frontend with Ventoy. Enabling you to create and manage for example; Ubuntu distributions with persistent images.
How the exFAT UEFI/BIOS version works
Once the drive has been prepared, you can use the front end Installer to learn more about, find, or download distributions and tools to put on a select drive. The front end will create an organized folder structure and copy each ISO to the drive for you (recommended if you want to the tool to keep track of your installations for removal). It can also create persistent storage files for you and the related .json entry. For example, each Ubuntu based distribution can have its own persistent storage up to 10GB. ;)
YUMI exFAT Boot Screen
SIDE NOTE: You can also create your own storage folders within the YUMI folder on the flash drive and then just drag and drop your ISO, IMG, WIM, VHD(x), VDI.vtoy, and EFI files into those folders. During startup, the system will add entries for discovered items. Stored files can be larger than 4GB.
BACKUP DATA: You must Backup any data you wish to keep before using the “Prepare Drive” option. When choosing the “Wipe Disk” option, all partitions on the selected drive will be wiped clean.
exFAT Download and Changelog:
07 Aug 2022 YUMI-exFAT-18.104.22.168.exe: Include option to run a full Ubuntu and CentOS Install from a RAW Image on USB.
YUMI exFAT SHA-256: 27a72d1dcbaec3923839fc283bf1e4bda9352ea4d14439e4ba8ed9e665a9760c
YUMI Legacy (BIOS USB Boot Only)
You can use this version if your computer supports BIOS booting, and if you do not plan to run your Windows installers in UEFI mode. Most modern motherboards still have Legacy BIOS firmware support though CMS Legacy mode.
Install ISO Files to USB from the Setup Screen
Run ISOs from the Multiboot USB Boot Menu
BACKUP DATA: You must Backup any data you wish to keep before using the “Format” options. When choosing the “Wipe Entire Disk” option, all partitions sharing that disk number will be wiped clean.
Legacy Download and Changelog:
30 Jan 2022 YUMI-22.214.171.124.exe: Added support for newer versions of Redo Rescue Backup and Recovery.
YUMI SHA-256: 168A7FD30817E07EFECBD1805FF1E8629A62BE137B74D0B77958472F0993D134
YUMI UEFI (BIOS and USB UEFI Boot)
The YUMI UEFI variant utilizes GRUB2 for both BIOS and UEFI booting. It is important to note that the UEFI version is not backwards compatible with the legacy variant. In addition, your drive must be Fat32 formatted to support booting in UEFI mode. This boot creation software does include the fat32format utility to help you format drives larger than 32GB as Fat32.
Drag and Drop ISO Support?
The “Try Unlisted ISO” option supports the ability to drag and drop additional ISO files to try to boot into the /multiboot/ISOS folder. They will be autodetected and their entries automatically appended to the Boot Menu.
BACKUP DATA: Backup your content from ALL partitions on your select device before using the “Wipe and fat32 format” option. The entire disk will be wiped clean!
Diskpart is used to wipe the select drive clean and then create a single partition using the same drive letter. Fat32format is used to format the large partition as fat32.
SECURE BOOTING: If it is enabled, you will need to disable secure boot from your computers BIOS/UEFI system firmware menu, before booting.
UEFI+BIOS FAT32 Download and Changelog:
03 Jul 2022 YUMI-UEFI-0.0.4.6.exe: Detect if running natively or from WINE.
YUMI UEFI SHA-256: f2f5d2b4f86fd281b2b9a730d883c7bb5dbc7aef98bb46db8956ffc0ff33c013
Running YUMI from LINUX: Professor Rafael showing YUMI UEFI running from WINE on Debian.
YUMI Basic Essentials
NOTE: YUMI exFAT works with exFAT formatted USB drives. For the legacy variant, your USB drive must be Fat32/NTFS formatted, otherwise Syslinux will fail and as a result, your drive will NOT Boot. NTFS may not work with every distribution but is required for storing files over 4GB. The UEFI variant must use Fat32 format.
The Installer will format your select USB drive, but be aware that all partitions on the select disk will also be deleted. Ensure that you have made a backup of any information you want to keep before using YUMI on any drive.
Basic Essentials to create a Multi System Bootable USB Drive
Recommended: You will have the best experience when using a Fast SSD Flash Drive. Here is a list of recommended Fast Flash Drives.
- 2GB+ Formatted Flash Drive (128-256GB recommended).
- Computer that can boot from USB.
- Windows 11, 10, 8, 7 Operating Environment.
- YUMI (to create a Multiboot Bootable USB).
- Your favorite ISO Files.
Please inform me of unlisted “FREE” Live Linux distributions or version revisions, and I will attempt to update the USB Multiboot Tool to support them. Additionally, developers who wish to have their Live Linux distribution added, can direct me to a copy to try.
YUMI exFAT Changelog
- 07 Aug 2022 Version 126.96.36.199: Run a full Ubuntu and CentOS Install from a RAW Image .VDI file on USB (VDisk).
- 05 July 2022 Version 188.8.131.52: Included several more supported Linux distributions and download links.
- 05 July 2022 Version 184.108.40.206: Add option to set VHDx size via slider and select Windows install image number when using the option to Run Windows 11 from USB. Update Mke2fs to later version supporting ext4 persistent file creation. Remove persistent file size limit.
- 15 June 2022 Version 220.127.116.11: Fix to check for Ventoy folder when used with VHDboot.img.
- 08 June 2022 Version 18.104.22.168: Add ability to Fully Run Windows from USB via VHDx image of PhoenixOS Lite.
- 06 June 2022 Version 22.214.171.124: Added support for Linux Lite and MX Linux with persistence.
- 17 May 2022 Version 126.96.36.199: Update to work on multiple Windows builds. Added Persistence support for Fedora, ArchLinux, and Kaspersky.
YUMI UEFI Changelog
- 03 Jul 2022 Version 0.0.4.6: Detect if running natively or from WINE.
- 05 Mar 2022 Version 0.0.4.5: Detect if Windows install.swm file exists before using DSIM. Don’t display Unlisted ISO menu entries if no files exist in the directory.
- 29 Jan 2022 Version 0.0.4.4: Added support for newer Redo Rescue Backup and Recovery versions.
- 25 Nov 2021 Version 0.0.4.3: Quick Fix to allow spaces in Windows user profile.
- 18 Oct 2021 Version 0.0.4.2: Updated to support writable persistence for Lubuntu, Xubuntu, Kubuntu 20.04+.
- 28 Aug 2021 Version 0.0.4.1: Updated to support newer Archbang and Archlinux.
- 22 Aug 2021 Version 0.0.4.0: Fixed error “YUMI will not attempt to install on (disk 0). Did you select a drive?” after uninstalling a distribution and then proceeding to install another. Allow previously selected disk number to persist on subsequent installs.
- 04 May 2021 Version 0.0.3.9: Allow running from earlier; I.E Windows 7 versions. Moved checkpoint to prevent format and wipe option from appearing if OS is not at least Windows 8.
- 26 Apr 2021 Version 0.0.3.8: Re-enabled option to display drives detected by Windows as Local Drives (fixed) disks in addition to (removable media). Added secondary confirmation message before proceeding to Wipe and Format a drive. Added a checkpoint to prevent the installer from running if the operating environment is not at least Windows 8.
- 21 Apr 2021 Version 0.0.3.7: Fixed Windows 10 Installer to work with newer Windows 10 ISOs with an Install.wim larger than 4GB. Also added support for LinuxCNC.
- 16 Apr 2021 Version 0.0.3.6: Fixed broken System Rescue option. Also set to show (removable media) only. Devices listed as local (fixed) disks are not displayed.
- 19 Mar 2021 Version 0.0.3.5: Updated to support memtest 86+ 5.3.1. Also removed some distros that are no longer in development. Fixed some broken links.
- 19 Jan 2021 Version 0.0.3.4: Added Try Unlisted ISO option. Switched to use diskpart to wipe and create a single partition, then use fat32 format.
- 11 Jan 2021 Version 0.0.3.3: Updated to use Grub2 MBR instead of chain loading from Syslinux. Also added additional drive checkpoints.
Legacy YUMI Changelog
- 29 Jan 2022 Version 188.8.131.52: Updated to support newer versions of Redo Rescue Backup and Recovery.
- 25 Nov 2021 Version 184.108.40.206: Quick Fix to allow spaces in Windows user profile.
- 18 Oct 2021 Version 220.127.116.11: Updated to support writable persistence for Lubuntu, Xubuntu, Kubuntu 20.04+.
- 29 Sept 2021 Version 18.104.22.168: Bug Fixed – distributions were not being removed from the boot menu after using the remove installed distros option.
- 04 Aug 2021 Version 22.214.171.124: Updated to extract and run AmogOS with persistence from a directory.
- 23 Jul 2021 Version 126.96.36.199: Updated to support AmogOS.
- 04 May 2021 Version 188.8.131.52: Allow running from earlier; I.E Windows 7 versions. Moved checkpoint to prevent NTFS format and Wipe options from displaying if OS is not at least Windows 8.
- 19 Apr 2021 Version 184.108.40.206: Set to show Local Drives in addition to flashdrives. Include an additional confirmation prompt before proceeding to Wipe and or Format. implemented a checkpoint to prevent the tool from running if not at least Windows 8.
- 19 Apr 2021 Version 220.127.116.11: Updated to support Linux CNC. Also corrected Super Grub2 Disk entry.
- 16 Apr 2021 Version 18.104.22.168: Set to show removable media only. As a result, devices listed as local (fixed) disks are no longer displayed.
- 19 Mar 2021 Version 22.214.171.124: Removed some distros that are no longer in development. Also fixed several broken links.
- 11 Jan 2021 Version 126.96.36.199: Moved persistent file creation back to local drive when using NTFS format (You do still need to make sure you have enough empty space to store the persistent file locally while it is being created). Also created additional checkpoints for drive selection.
How to Create a MultiBoot USB Flash Drive (Windows)
- Run* YUMI following the onscreen instructions.
- Then, Run the tool again to Add More ISOs/Distributions to your Drive.
- Restart your PC. But be sure to set your Boot Menu to boot from the USB device.
- Select a distribution to launch. Then, boot and enjoy!
That’s really all there is to it. If all went well, then you should be booting your favorite distributions from your custom Multi-Boot USB device!
Creating a MultiBoot Bootable USB Flash Drive (Linux)
The following instructions were performed from an Ubuntu host environment.
NOTE: The following method is currently broken and will be updated at a later point.
I. Format your USB Flash Drive to use a Single Partition: Open a terminal and type
fdisk -l(and note which device is your USB Drive)
fdisk /dev/sdx(replacing x with your actual usb device)
d(to delete the existing partition)
n(to create a new partition)
p(for primary partition)
1(to create the first partition)
Press Enter(to use the first cylinder)
Press Enteragain (to use the default value as the last cylinder)
1(to mark the first partition active “bootable”)
t(for partition type)
c(to use fat32 partition)
w(to write the changes and close fdisk)
II. Create a Fat32 Filesystem on the USB Flash Drive:
umount /dev/sdx1(to unmount the mounted partition).
mkfs.vfat -F 32 -n MULTIBOOT /dev/sdx1(to format the partition as fat32).
Remove and reinsert your USB flash drive, or remount it.
III. Install WINE:
- To install WINE from within an Ubuntu operating environment, first open a terminal and type sudo apt install wine, then press enter. Once WINE is installed, launch the installer as you normally would by simply clicking the YUMI-188.8.131.52.exe
How a YUMI Multisystem Bootable USB Works
YUMI (Your Universal Multiboot Installer) enables each user to create their own custom Multiboot UFD containing only the distributions they want. Presented in the order by which they are installed. A new distribution can also be added to the bootable device each time the tool is run.
If you run YUMI from the same location you store ISO files, then they should be auto detected (*See Known Issues Below), eliminating the need to browse for each ISO.
Other Notes: If MultibootISOs was previously used, you must reformat the drive, and start over. The Legacy variant uses Syslinux directly, and chain loads to grub only if necessary, so it is not compatible with the older Multiboot ISO tool.
USB Bootable ISO files
Supported Bootable Live Linux Distros, Portable Operating Systems, Windows Installers, and tools do vary between UEFI Boot and Legacy variants. This list is not all inclusive.
USB Debian Live
- Debian Live
- * Debian Installer
Bootable USB Linux Mint (with persistence)
- Linux Mint
- * Linux Mint Debian Edition
- OpenSUSE 32bit
- * OpenSUSE 64bit
USB Puppy Linux
- DPup Exprimo
- Lucid Puppy Linux
- Precise Puppy Linux
- Racy Puppy Linux
- Slacko Puppy
- Wary Puppy Linux
Bootable USB Ubuntu (with persistence)
- *Ubuntu Gnome
- ** Ubuntu Server Installer
- *** Ubuntu Secure Remix
- **** Ubuntu Studio
Other Distros Alphabetical
- CAELinux (Computer Aided Engineering)
- CentOS Live
- Damn Small Linux (DSL)
- gpxe (Net Bootable Distros)
- OSGeo Live
- Peach OSI Linux
- Pear Linux
- Pinguy OS
- Scientific Linux CERN
- Semplice Linux
- SLAX (Tiny Slackware Based Distro)
- Slitaz (Another Tiny Distro)
- Sparky Linux
- Sugar on a Stick
- System Rescue CD
- Tails (Anonymous Browsing)
- Liberte (Anonymous Browsing)
- TinyCore (A Tiny Linux Distribution)
- Ultimate Edition 3
- Zorin OS Core
USB NetBook Distributions
- EasyPeasy (NetBook Distro)
- Jolicloud (NetBook Distro)
- Ubuntu Netbook Remix
- xPUD (Netbook Distro)
USB Antivirus Tools
- Acronis Antimalware CD
- AOSS (Malware Scanner) system\stage1
- AVG Rescue CD (Antivirus Scanner)
- AVIRA AntiVir Rescue CD (Virus Scanner) ; does install to root of drive
- Bitdefender Rescue Disk (Antivirus Scanner)
- Comodo Rescue Disk (Antivirus Scanner)
- Dr.Web Live CD ; does install to root
- F-Secure Rescue CD
- GDATA Rescue CD
- Kaspersky Rescue Disk (Antivirus Scanner)
- Panda SafeCD
- Windows Defender Offline
USB System Tools
- Acronis True Image
- BackBox (Penetration Testing)
- BackTrack5 (Penetration Testing)
- Boot Repair Disk
- Clonezilla (Backup + Clone Tool)
- DBAN (Hard Drive Nuker)
- Deft (Forensics)
- DRBL (Diskless Remote Boot in Linux)
- EASEUS Disk Copy (Disk Cloning Tool)
- FreeDOS (Balder img)
- GParted (Partition Tools)
- GRML (system rescue)
- HDT (Hardware Detection Tool)
- Kali (Penetration Testing)
- Memtest86+ (Memory Testing Tool)
- Matriux (Penetration Testing)
- Offline NT Password & Registry Editor
- Ophcrack (Password Finder)
- Parted Magic (Partition Tools)
- PING (Partimg Is Not Ghost)
- Partition Wizard (Partition Tools)
- Redo Backup And Recovery (Recovery Tools)
- Rip Linux (Recovery Distro)
- Trinity Rescue Kit ; does install to root of drive
- Ultimate Boot CD (Diagnostics Tools)
- Web Converger (Web Kiosk)
Bootable USB Windows 10 8 7 XP and Other OS/Tools
- Linux Live Tools for OCZ
- Linux CNC
- Hiren’s Boot CD ; does install to root of drive
- Falcon 4 Boot CD ; does install to root of drive
- Hiren’s Boot PE
- Sergei strelec WinPE
- Other WinPE
- Kon-Boot Floppy Image
- Windows 10 8 7 Installer
- Windows XP Installer
- Windows To Go
Run Windows 11 from VHD on USB
The Install, boot, and run Windows from VHDx on USB option is available via the exFAT variant.
- Phoenix LiteOS – Put Windows 10 or 11 on USB
Unlisted USB Bootable ISOs
- Try an Unlisted ISO (SYSLINUX)
- * Try an Unlisted ISO (GRUB)
- ** Try an Unlisted ISO (GRUB Run from RAM)
Troubleshooting, Known Issues, Bugs
The Persistence feature is currently broken with Newer Debian based distributions due to changes upstream. Debian now requires the persistent block file and label to be named persistence instead of live-rw, and it must hold a persistence.conf file containing / Union.
With the Legacy variant, if you encounter a message stating
An error (1) occurred while executing syslinux. Your USB drive won't be bootable.
Make sure your drive is formatted using a Fat32 or NTFS partition with an MBR (Master Boot Record). An exFAT formatted Partition will not work. GPT (GUID Partition Table) Fat32 or NTFS Partitions are also not currently supported.
If you encounter a message stating
Insane primary (MBR) partition. Can’t find myself on the drive I booted from
First, replace your chain.c32 file located at multiboot/chain.c32 with (you’ll need to unzip the file) -> This zipped chain c32 File
If replacing the chain.c32 file does not fix the problem, your Bootable USB drive may be improperly formatted, contains more than one partition or MBR, or your BIOS is not properly detecting the USB drive as USB-HDD, and/or its firmware needs to be updated. You can try these methods to Format and Restore your USB Drive
Windows to Go/Installers – Options Explained
YUMI Legacy Variant:
The Windows to Go option creates a VHD file that is 20GB in size. As such, it requires the drive to be formatted NTFS. Fat32 cannot support a file more than 4GB in size. Many flash drives you might find at local department stores won’t be fast enough. You’ll need a Very Fast Flash Drive. When Windows boots from the USB for the first time, it will go through the setup process and then reboot. You’ll need to boot using your Windows to Go menu option a second time to finalize the setup process and finally boot into your full Portable Windows.
The Single Windows Installer/PE options are most likely to work for both stock and modified ISO files. When using it, you are limited to storing one Windows Installer per USB drive (I.E. one Win XP and one Win Vista 7 or 10). The Multiple Windows Installer/PE options allow for storing more than one stock Windows Installer per drive. Generally, only unmodified Windows ISO files will work with this option.
-wimboot option stores the extracted Multi Windows Installers in their own directory. -bootmgr option moves the bootmgr and bcd files to root of drive. (note: -bootmgr option does require a Windows Vista or later host to run bcdedit).
The Legacy variant does not natively include files to make it UEFI Boot from USB. However, it is still possible to boot and run your Windows Installers from UEFI. To switch between added Windows versions, navigate to the multiboot/win-directory (replacing win-directory with the Windows version you want to boot) on your USB. Once there, move the bootmgr, bootmgr.efi, and entire boot folder to the root of your USB drive. Then reboot, booting your computer from the UEFI compatible USB. If all went well, it should boot straight into your chosen Windows Installer.
Try Unlisted ISO – Options Explained
Legacy Boot Variant:
- Try Unlisted ISO (Grub Partition 4) – This boot option will attempt to boot the ISO file using Grub. It adds a 4th partition table to the USB device and uses this as a placeholder for the ISO. This method should successfully boot most Linux based distributions.
- Try Unlisted ISO (Grub) – Same as boot option 1, but attempts to boot the ISO without using a 4th partition as a placeholder for the ISO.
- Try Unlisted ISO (Grub From RAM) – Same as boot option 2, but attempts to store the ISO in system memory and boot it from there. Useful for cases where the ISO is small, and you’d like to boot the OS and then move the USB to different machines and subsequently boot the OS from them as well.
- Try Unlisted ISO (via Syslinux) – The original default supported boot option. Syslinux works to boot many distributions, but not all.
UEFI Boot Variant:
- Try Unlisted ISO – This boot option will attempt to boot the ISO file using Grub Partnew. It works by creating a 4th partition table on the USB device (a 4th partition must not already exist) to use as a placeholder for the ISO. Then, either the configuration file or Linux and Initrd files are located and Boot is attempted. The “Try Unlisted ISO” option found in the UEFI variant supports the ability to drag and drop new ISO files to try into the /multiboot/ISOS folder. They will be autodetected and added to the menu.
Multiboot folder and volume name.
Most added distributions are stored within the multiboot folder. This is also the root directory set for syslinux. In some cases, the Volume Label of your USB drive must be MULTIBOOT in order for OpenSUSE, CentOS and several other distributions to boot. YUMI will attempt to automatically create this Volume Label, however it can sometimes fail. So please ensure that the Volume Label of your USB remains MULTIBOOT if you expect your distributions to boot.
When booting Linux distributions from some laptops such as the Lenovo Yoga with a touchscreen, the acpi=off boot parameter might be necessary in order to successfully boot.
My PC wont Boot from my Flash Drive, but BIOS supports USB boot!
Some Flash Drives ship formatted (without a partition), but all variants require the drive to contain a partition with a MBR (Master Boot Record). To ensure compatibility, the installer will format your device.
How to force a rebuild of the Syslinux MBR:
This is very useful if your drive is somehow no longer bootable.
From the multiboot folder on your flash drive, delete the hidden file ldlinux.sys and then rename the libcom32.c32 file to _libcom32.c32. Then use YUMI to install any menu item. The installer will notice that the file is missing and will then attempt to reinstall syslinux and repair the master boot record. Once finished, rename _libcom32.c32 back to libcom32.c32.
Other Known Issues:
TAILS – If your Multiboot Bootable USB is detected as a “fixed” hard drive and not a “removable” disk, (a few Sandisk drives have the removable bit flipped this way), you will need to remove occurrences of the boot parameter “live-media=removable” from the Live64.cfg file found at “\multiboot\tails-amd64-3.3\EFI\BOOT\” or consequently TAILS will fail to find the live filesystem.
The files for Flacon 4, Hiren’s Boot CD, Trinity Rescue Kit, Backtrack, Avira Antivir, and Dr.Web Live are stored outside of the multiboot folder. Most other distribution files remain contained within the multiboot folder. Feel free to inform me of a simple working solution!
The older variants support Windows XP Install from USB via ISO. In order for the Windows XP installation to succeed, you must perform the following steps;
1.) To begin an install, select (Stage 1)
2.) Upon first reboot, you must select (Stage 2)
3.) Finally, after (Stage 2) is complete – upon the second reboot, select (Stage 3) to boot the drive where you installed Windows XP. If this option fails, simply remove the flashdrive and reboot!
* The Legacy variant does support NTFS, however not all distributions will boot from an NTFS formatted device. Though Windows to Go and distributions containing files over 4GB require using NTFS with the Legacy variant.
Troubleshooting Boot Errors:
While trying to run an ISO from USB, If you get a Boot error saying:
Error 60: File for drive emulation must be in one contiguous disk area
This generally happens on the persistence file, when using YUMI Legacy with NTFS format. You may have to do this after adding an Ubuntu based distro with persistence on an NTFS drive. Though still possible, Fat32 filesystems don’t encounter this issue as often.
You will need to defragment your ISO or persistence file:
Defraggler <— recommended (free version works fine).
Defragmenting an ISO File
When using the “Try an Unlisted ISO (GRUB)” options in YUMI Legacy, broken or non-bootable menu entries can be fixed by editing its corresponding entry found in \multiboot\menu\menu.lst
If you don’t have a floppy drive and get fd0 errors while booting, simply add floppy.allowed_drive_mask=0 to the append line for the troubled entry. Although the best fix is to simply disable floppy in BIOS.
Persistently Saving Changes: YUMI uses the casper-rw persistence feature for some (but not all) Ubuntu based distributions. Yes, you can also have multiple persistent distributions, as each distro utilizes its own casper-rw file. * Persistence will not always work on NTFS formatted USB drives. Additionally, some distributions will not boot via NTFS.
Ophcrack Tables. In order to load Ophcrack tables, the tables folder needs to exist at the root directory of the USB device; (example F:\tables\vista_free). You can Get Ophcrack Tables from the Official Ophcrack site. Once downloaded, simply unzip them to the root of your USB. Because you’re using this method, you can have your Windows XP and Vista/7/10 tables all working together on the same device.
YUMI on Linux: Some versions of YUMI can be run from WINE.
YUMI can be pronounced Yŭh * Mēē or “YUMMY”. It is often misspelled YUMMI, YUUMI, or YUMY. Some might also call it Yū * Mēē or “YOU ME”.