Installing or reinstalling MikroTik RouterOS on an x86 PC or a custom hardware appliance is usually a straightforward process. However, many network administrators encounter a frustrating roadblock during the Netinstall or CD boot process:

This image is specifically designed for flash media, bypassing the need for a CD-ROM check. 3. Perform a Netinstall (Recommended)

2. Fix for Virtual Machine Installations (VMware/VirtualBox)

: Click the Net booting button inside the app. Check Boot Server Enabled and assign a client IP address within your subnet (e.g., 192.168.88.3 ).

If you are continuously failing with the "No CD-ROM found" error, switching to the method is the best solution. Netinstall ignores the need for a physical or virtual optical drive, booting the router over the network (PXE) to install the system image directly onto the storage drive. Steps for Netinstall: Download Netinstall for Windows/Linux.

The best approach is to embrace the powerful, official tools provided by MikroTik. is the most reliable solution, designed to handle installations where other methods fail. For even more direct control, using the IMG imaging method or moving the hard drive are equally effective and bypass the root cause of the error entirely. By understanding the "why" behind the error and mastering these flexible installation techniques, you can confidently install RouterOS on almost any hardware, freeing yourself from the constraints of legacy installation media.

Leo blinked. "What?"

Add an empty optical drive to the IDE Controller, then mount your RouterOS ISO file to it. For Proxmox VE Select your RouterOS VM and go to the tab.

The MikroTik installer boots into a basic environment from the ISO, but then it must "re-find" the CD-ROM or USB drive to pull the actual installation packages. If the storage controller (SATA/IDE) or the USB interface isn't recognized by the older RouterOS kernel, it triggers the FATAL ERROR: no cd-rom found message.

Connect the target drive to a functional computer or boot the system using a live Linux USB (like Ubuntu) or Windows Installation media.

By working your way down this list, you will resolve the driver and interface mismatches causing the "no cd-rom found" error, allowing you to successfully deploy your x86 MikroTik router.

Re-insert the drive into the MikroTik machine and attempt the installation again.

: Set your CD-ROM and Hard Disk to IDE instead of SATA, SCSI, or VirtIO. Older versions of RouterOS often lack the drivers for modern virtualized controllers during the install phase.

Connect the target computer via Ethernet directly to your computer.

The CHR version is to the ISO "Full" version. It includes all routing, firewall, VPN, and wireless packages (if you have wireless hardware supported via PCI passthrough).

The error is a ghost of computing past—a legacy kernel expecting an IDE CD-ROM in a world of NVMe and AHCI. You now have three complete solutions:

Netinstall is the most reliable method for x86 installations and recovery: "FATAL ERROR: no CD-ROM found" during installation

Use the dd command. This is an extremely powerful tool that can write the image to the drive directly. The command will look something like:

: Older RouterOS versions (especially RouterOS v6) lack the drivers to detect drives connected via modern AHCI or SATA controllers.