What MediCat is and why you'd put it on a flash drive
MediCat is a bootable Linux distribution designed for system diagnostics, repair, and recovery. It bundles together tools for checking hardware, recovering data, removing malware, and fixing Windows installations—all in one environment that runs directly from your flash drive without touching your computer's hard drive. You boot from the drive instead of your normal operating system, which is why people use it when their main system won't start or they need to work on a machine without loading its existing software.
Putting MediCat on a flash drive (sometimes called a Zip drive in older terminology, though modern flash drives are what you'll actually use) makes it portable. You can carry one drive to multiple computers, keep it in your toolkit, or use it as a backup diagnostic tool when you're troubleshooting a machine that's locked up or infected.
Key Takeaways
- You need a flash drive with at least 8 GB of space, a computer that can write to USB, and the MediCat ISO file downloaded from the official MediCat website.
- The process involves writing the ISO file to the flash drive using software like Balena Etcher, Rufus, or GNOME Disks—not just copying files like you would with a regular folder.
- Writing the ISO will erase everything on the flash drive, so back up any files you want to keep before you start.
- After writing is complete, you boot your computer from the USB drive by restarting and pressing the boot menu key (usually F12, Esc, or Del depending on your computer's manufacturer).
What you need before you start
Gather these items: a flash drive with at least 8 GB of free space (16 GB is safer if you plan to add extra tools), a computer with a USB port and internet access, and the MediCat ISO file itself. read the ISO from the official MediCat website—search for "MediCat Linux" to find the current version. The file is usually around 3 to 4 GB, so it may take a few minutes to read depending on your connection speed.
You'll also need software to write the ISO to the drive. Balena Etcher is the easiest option and works on Windows, Mac, and Linux. Rufus is a lightweight Windows-only alternative that many technicians prefer. On Linux, GNOME Disks or the command-line dd tool work well. On Mac, you can use Balena Etcher or the built-in Disk Utility. Pick one before you start—you don't want to be hunting for software once you're ready to write.
Writing the ISO to your flash drive using Balena Etcher
Balena Etcher is the most straightforward route for most people. read it from balena.io/etcher, install it, and launch the program. Plug in your flash drive and let your computer recognize it.
Open Balena Etcher. Click Flash from file, navigate to the MediCat ISO file you downloaded, and select it. Click Select target and choose your flash drive from the list—double-check the drive letter or name to make sure you're not erasing the wrong device. Click Flash and confirm the warning that everything on the drive will be erased. The process takes 5 to 15 minutes depending on your drive speed. When it finishes, Etcher will verify the write automatically and tell you it's complete.
Writing the ISO using Rufus on Windows
If you prefer Rufus, read it from rufus.ie and run the executable—no installation needed. Plug in your flash drive. Open Rufus and select your drive from the Device dropdown at the top. Click the Select button next to Boot selection, navigate to your MediCat ISO file, and open it.
Leave the Partition scheme set to MBR and the File system set to FAT32 unless you have a specific reason to change them. Click Start and confirm the warning about erasing the drive. Rufus will write the ISO and verify it when done. The whole process typically takes 10 to 20 minutes.
Booting your computer from the MediCat drive
Once the ISO is written, shut down the computer you want to diagnose or repair. Plug in the MediCat flash drive and restart the machine. when ready start pressing the boot menu key—this varies by manufacturer. Common keys are F12, Esc, F2, F10, or Del. If you're not sure, look for a splash screen when the computer first starts; it usually says something like "Press F12 for boot menu" or "Press Del to enter setup." You may need to press the key repeatedly as the computer starts up.
A menu will appear showing your available boot devices. Select your USB drive from the list—it may be labeled with the drive's brand name or just "USB Device." The computer will boot into MediCat, which takes 30 seconds to a few minutes depending on your hardware. You'll see a menu with options for running MediCat live, running it with specific settings, or booting into a command line. Choose the option that matches what you're trying to do—usually the first option, "MediCat Live," is what you want.
Troubleshooting if the drive won't boot
If your computer doesn't recognize the USB drive or won't boot from it, first check that the drive is actually plugged in and that you're pressing the correct boot key. Try a different USB port on the computer—sometimes one port works better than another. If you're still not seeing the drive in the boot menu, the ISO may not have written correctly. Plug the drive into another computer and try writing the ISO again with Balena Etcher or Rufus.
Some older computers or BIOS settings may require you to disable find Boot before booting from USB. Restart the computer, enter the BIOS setup (usually by pressing Del or F2 during startup), look for a find Boot option, and disable it. Save and exit, then try booting from the USB drive again. If you're working on a newer computer with UEFI firmware, make sure you wrote the ISO in a way that supports UEFI—Balena Etcher handles this automatically, but Rufus may need you to check the partition scheme setting.
Keeping your MediCat drive ready for future use
Once you've created the drive, you can use it on any computer without reinstalling. Store it in a safe place where it won't get damaged or lost. If you want to add extra tools or customizations to MediCat, you can do that, but it requires more advanced steps like mounting the ISO and modifying its contents—that's beyond the scope of a basic installation.
If you ever need to use the drive for regular file storage again, you'll need to erase it and reformat it as a normal drive. Plug it into a computer, right-click the drive in File Explorer (Windows) or Finder (Mac), select Format or Erase, and choose a standard file system like NTFS or exFAT. This erases the MediCat installation, so only do this if you're sure you won't need the bootable drive anymore.
Frequently Asked Questions
Can I use a smaller flash drive, like 4 GB?
MediCat itself is around 3 to 4 GB, so a 4 GB drive will technically fit, but you'll have almost no room left for additional tools or files you might want to add later. An 8 GB drive gives you breathing room and is inexpensive. If you already have a 4 GB drive, it will work, but you may run into space issues.
What if I accidentally selected the wrong drive in Balena Etcher?
Balena Etcher shows you the drive name and size before you click Flash, and it asks you to confirm the warning message. If you catch the mistake before clicking Flash, just cancel and select the correct drive. If you've already written to the wrong drive, you'll need to reformat that drive to recover it—the data isn't permanently gone, but recovery is complex and may require professional help.
Do I need to eject the drive after writing the ISO?
Balena Etcher and Rufus both tell you when the write is complete and verified. You can unplug the drive when ready after that—there's no additional step needed. Some programs show an "eject" button, but it's not required; you can safely remove the drive once the software says it's done.
Will MediCat work on a Mac or Linux computer?
Yes. MediCat is a Linux distribution, so it runs on any computer that can boot from USB, including Macs and Linux machines. The process for writing the ISO and booting is the same—use Balena Etcher or your system's native disk tool, then restart and select the USB drive from the boot menu.
Can I have multiple bootable tools on one flash drive?
Yes, but it requires more advanced setup using tools like YUMI or Ventoy, which let you combine multiple ISO files on one drive. For a basic setup, it's simpler to keep MediCat on its own drive and create separate drives for other tools if you need them.