Installing Windows NT 4.0

System Requirements & Setup

Written in January 17, 2026

Released in 1996, Windows NT 4.0 was Microsoft's primary business operating system, bringing the popular "Start Menu" interface to the stable and secure NT kernel. Unlike Windows 95, which was built on top of MS-DOS, NT 4.0 was a true 32-bit operating system designed for high-end workstations and enterprise servers.

You can watch my YouTube video about a Windows NT 4.0 installation using VirtualBox.

Source: YouTube - Windows NT 4.0 installation in VirtualBox (lab demo)

Instructions

When setting up Windows NT 4.0 in VirtualBox, it is best to select the "Windows NT 4" version template. You should allocate 64 MB to 128 MB of RAM, 1 CPU core, and a virtual hard disk of 2 GB to 4 GB.
  1. Open VirtualBox and click "New" to create a new virtual machine.
  2. Name the VM (for example "Windows NT 4.0"), set Type to "Microsoft Windows", and choose the "Windows NT 4" version template if available.
  3. Assign between 64 MB and 128 MB of RAM and keep the VM to a single CPU core for stability.
  4. Create a new virtual hard disk (VDI, dynamically allocated) with a size between 2 GB and 4 GB.
  5. Open Settings → Storage and attach your Windows NT 4.0 ISO (or CD image) to the virtual optical drive.
  6. In Settings → System, confirm that the optical drive is first in the boot order so setup starts from the CD.
  7. Start the VM and begin the text-mode setup to create and format a primary partition on the virtual disk.
  8. Choose the desired file system (typically NTFS for better reliability) when prompted.
  9. Allow the installer to copy files, reboot, and continue into the graphical setup phase.
  10. Follow the prompts to set your administrator password, time zone, and networking options.
  11. After installation is complete, remove the ISO from the virtual drive so the VM boots directly into Windows NT.