MS-DOS 6.22 Setup Flags to Bypass Hardware Checks

This article explains how to bypass hardware detection during the MS-DOS 6.22 setup process using specific command-line switches. You will learn the exact flag required to prevent installation hangs caused by automated hardware checks, why this issue occurs on legacy and modern systems, and the step-by-step commands needed to complete the installation successfully.

The primary setup switch used to bypass hardware detection in MS-DOS 6.22 is /I.

When running SETUP.EXE normally, the installer initiates an automated routine to detect system components such as the processor, memory configuration, video card, and attached disk controllers. On virtual machines (such as VirtualBox, VMware, or QEMU), emulated environments, or non-standard legacy machines, this detection scan frequently causes the system to freeze or fail entirely. Executing SETUP /I instructs the installer to turn off automatic hardware detection and proceed using standard default configurations.

How to Use the Setup Switch

  1. Insert MS-DOS 6.22 Installation Disk 1 into your floppy drive (or mount the disk image) and boot the computer.
  2. When the initial setup welcome screen appears, press F3 to exit the setup utility. You may need to press F3 a second time to confirm dropping to the command line.
  3. At the A:\> prompt, enter the following command: 
    SETUP /I
  4. Follow the on-screen instructions to complete the installation. You will be prompted to manually confirm standard hardware settings, such as your display type and keyboard layout.

Complementary Setup Switches

If your setup continues to encounter hardware or disk-check barriers, you can combine /I with other utility switches:

  • /C: Skips the automatic ScanDisk disk-integrity check prior to installation, which often hangs on certain large or virtualized drives.
  • /U: Forces the upgrade or installation even if the installer detects an unrecognized partition or an unsupported disk configuration.
  • /B: Forces the installer to run in monochrome mode, bypassing video adapter compatibility issues.

To bypass both the hardware scan and the pre-installation disk check simultaneously, run:

SETUP /I /C

Using these flags allows MS-DOS 6.22 to install cleanly onto systems where automatic detection routines would otherwise result in a crashed or stalled setup.