How to Run DOS 6.22 on a USB

You may want the option to boot to the older MS-DOS 6.22 prompt rather than one of the more recent versions of Microsoft Windows. MS-DOS is also a good tool for troubleshooting, if you know how to use it. You can run MS-DOS 6.22 from USB flash drive that boots to the DOS environment.

USB Flash drive lying on computer laptop keyboard and pen
A USB drive and a pen on top of a laptop.
credit: alekleks/iStock/Getty Images

Step

Navigate to the AllBootDisks ISO Image Downloads page (allbootdisks.com/download/iso.html). Click the "DOS6.22_bootdisk.iso" link to download the file and save it to your computer.

Step

Download "UNetBootin" (http://unetbootin.sourceforge.net/). This is a program designed specifically to create a bootable DOS USB drive.

Step

Extract all the files from the UNetBootin archive file with an archiving program such as WinRAR, WinZIP or 7-Zip. Launch the "UNetBootin.exe" file once the extraction has finished.

Step

Insert a USB flash drive into a free USB port on your computer.

Step

Click the "Disk Image" radio button, and click the "..." button. This will open a small dialog box that prompts you to select an ISO file.

Step

Navigate to where you saved the DOS 6.22 ISO file. Select the file and click "OK."

Step

Click the "USB Drive" option near the bottom of the window and select the drive letter that corresponds to your USB flash drive.

Step

Click "OK" to create your bootable USB drive.

Step

Restart your computer to boot into the DOS 6.22 environment instead of Windows. You may need to change the boot order in your BIOS so that your computer boots from the USB flash drive.