Normally, this should not be a problem. But usually, it always is. The Memtest86+ website hosts a specially prepped EXE auto-installer file that will format your USB flash drive, copy Memtest86+ binaries to it and make it bootable.


It's packed as a ZIP file and should work with Windows 7. The name of the file you run is Memtest86+ USB Installer.exe but I am having no luck with it today. Simply because I am unable to select my USB flash drive from the drop down menu. The menu is not showing any selectable item.


I tried version 5.01 and 4.20 on Windows 7 and got the same results. Can't select my USB flash drive. The flash drive is a SanDisk 4 GB Cruzer Blade, just unwrapped, brand new. I had it formatted with FAT32 inside Explorer to get rid of the extra software that SanDisk puts on it. I also rebooted Windows to make sure drivers are loaded. I can use the flash drive to copy files back and forth effortlessly, it just won't show up in the Memtest86+ prep tool.

I did try downloading the pre-compiled bootable binary for version 5.01 and tried to prep the USB flash drive with it using Linux Pen Drive. Inside this tool (Universal-USB-Installer- I selected "Try Unlisted Linux ISO". I got the same problem here. The USB flash drive is just not showing up.


However! Inside this tool you can select "Show all Drives". That way I can select my USB flash drive and hit the Create button.


It starts working on it but then returns an error. Some files are copied to the USB flash drive.


What else can a man do to get this thing working?

Logs are always nice...

Closing All Open Explorer Windows
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\fat32format.exe... 100%
Formatting G: as Fat32
Warning ALL data on drive 'G' will be lost irretrievably, are you sure
(y/n) :Size : 4GB 7821280 sectors
512 Bytes Per Sector, Cluster size 2048 bytes
Volume ID is 13f8:1e63
32 Reserved Sectors, 15217 Sectors per FAT, 2 fats
1947703 Total clusters
1947702 Free Clusters
Formatting drive G:...
Clearing out 30470 sectors for Reserved sectors, fats and root cluster...
Wrote 15600640 bytes in 6.45 seconds, 2.31 Megabytes/sec
Initialising reserved sectors and FATs...
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\syslinux.exe... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\syslinux.cfg... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\7zG.exe... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\7z.dll... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\chain.c32... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\menu.c32... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\vesamenu.c32... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\mbrid
Create folder: G:\uui
Copy to G:\uui\syslinux.cfg
Executing syslinux on G:
Execute: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\syslinux.exe -maf -d /uui G:
Syslinux Errors 0
Creating Label UUI on G:
Extracting the iso: The progress bar will not move until finished. Please be patient...
Execute: "C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\7zG.exe" x "C:\Users\support24\Downloads\memtest86+-5.01.iso\memtest86+-5.01.iso" -o"G:\" -y -x![BOOT]*
Editing Configuration Files
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\Uni-USB-Installer-Copying.txt... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\Uni-USB-Installer-Readme.txt... 100%
Extract: C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\license.txt... 100%
C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\Uni-USB-Installer-Copying.txt -> G:\Uni-USB-Installer-Copying.txt
1 File(s) copied
C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\Uni-USB-Installer-Readme.txt -> G:\Uni-USB-Installer-Readme.txt
1 File(s) copied
C:\Users\SUPPOR~1\AppData\Local\Temp\nskE617.tmp\license.txt -> G:\license.txt
1 File(s) copied
Checking if we need to replace vesamenu.c32, menu.c32, and chain.c32
Installation Done, Process is Complete!
  • 2
    I found this guide on PassMark website (current owners of the original Memtest86 program) and they also tell you to run (their own) specially prepped USB tool. It's the same basic idea.
    – Samir
    Mar 12, 2014 at 11:37

4 Answers 4


Skip Memtest86+! Go to Memtest86! Run! Done!

I've done what was asked of me, and according to the authors website. But it didn't work anyway. So what I have done is I used another Memtest 86 program. The original Memtest86 line, now up in version 5 (new free software license), and owned by PassMark. It was a breeze using it and making the UFD bootable. It's as simple as ABC.

  1. Go to Memtest86.com.
  2. Click on the link "Image for creating bootable USB Drive". This will download the file http://www.memtest86.com/downloads/memtest86-usb.zip for Windows.
  3. Unpack the ZIP file.
  4. Run the imageUSB.exe file and follow onscreen instructions.

This should work on both BIOS and UEFI BIOS systems. On UEFI systems you can even use the mouse pointer to navigate.


a b c d e f


12:38:47:845 - PassMark Software - imageUSB v1.1.1013
12:38:47:845 - Getting list of available removable USB drives...
12:38:47:845 - Inspecting Drive C:\...
12:38:47:845 - Inspecting Drive D:\...
12:38:47:845 - Inspecting Drive E:\...
12:38:47:861 - Inspecting Drive F:\...
12:38:47:861 - Inspecting Drive G:\...
12:38:47:861 - Ready...
12:39:56:377 - Drive G:\ added to queue.
12:39:56:392 - Note: Disk image was not created with imageUSB previously.
     Image file does not contain a valid checksum. Verification will be calculated from source image.
12:39:56:423 - Writing image C:\Users\support24\Downloads\memtest86-usb\memtest86-usb.img to G:\ (drive 1)
12:40:57:155 - Drive G:\ write completed.
12:40:57:623 - Verifying written image on Drive G:\
12:41:08:373 - Drive G:\ checksum completed.
12:41:08:373 - MD5 matched. (G:\).
     MD5 (Drive) : C7C53FCA0E9C1A6751FBB36E205D4F4A
     MD5 (Image) : C7C53FCA0E9C1A6751FBB36E205D4F4A
12:41:08:389 - SHA1 matched. (G:\).
     SHA1 (Drive) : 220A1073EE96D489AB4E9A44E90E7670AFE7EE03
     SHA1 (Image) : 220A1073EE96D489AB4E9A44E90E7670AFE7EE03

You can see it had some issues with checksums but it was false alarm, verification passed.

  • 5
    Sadly this does not answer the question though. This answers for a different program.
    – pipe
    Jun 5, 2020 at 18:44

For non-EFI machines and EFI implementations that do not not support memtest86.

Tools required

parted, dosfstools, gzip, tar, wget

Define USB device, memtest86+ version and SYSLINUX version

USB=/dev/sdX # where X corresponds to USB device

Download URLs


Partition USB and create 4MB FAT16 filesystem

parted -s ${USB} mklabel msdos mkpart primary fat16 2048s 5mib set 1 boot on
sync; sync; sync
mkfs.vfat -nMT86PLUS ${USB}1
mount ${USB}1 /mnt

Download and install memtest86+ binary

wget -qO- ${MEMTESTB} | gzip -d > /mnt/mt86plus

Create SYSLINUX configuration file to start memtest86+ binary

cat >/mnt/syslinux.cfg <<'!'
DEFAULT mt86plus
LABEL mt86plus
  kernel mt86plus

Download SYSLINUX, install MBR code and install SYSLINUX to USB

wget -qO- ${SYSLINUX} | tar -xJpf -
dd bs=440 if=syslinux-${SYS}/bios/mbr/mbr.bin of=${USB}
syslinux-${SYS}/bios/linux/syslinux -i -s ${USB}1
umount /mnt


rm -rf syslinux-${SYS}

This is admittedly a somewhat roundabout way, but it does let you run Memtest86+ from a USB! The way I ended up doing it was grabbing a Fedora Workstation ISO from https://getfedora.org and putting that onto the USB. Now, you might be wondering what Fedora has to do with this, but on their installer image Memtest86+ is available to be booted.

You will first be taken here. Select Troubleshooting. If you do not see this screen and you're on a UEFI system, try booting the USB via legacy boot/BIOS boot.

Fedora Workstation installer ISO initial screeen

Here, choose Run a memory test

Fedora Workstation installer ISO Troubleshooting screen

You should now be booted into Memtest86+!

Screenshot of Memtest86+

  • 1
    As of now, there's a good chance that a new PC is using the UEFI mode and the memtest86+ option is not available, cf. askubuntu.com/a/952326/738995
    – ArtemGr
    Oct 29, 2020 at 19:53

You can just download the MemTest86+ ISO and copy with dd to your USB pen:


wget -q ${URL} -P /tmp/
unzip  /tmp/mt86plus_6.00b1_64.grub.iso.zip -d /tmp/
dd if=/tmp/mt86plus_64.iso of=${USB_PEN}

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