Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware.Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. Make Bootable Disks: How To Make an MS-DOS 6.22 Bootable USB Drive; Nov. 23, 2010 Make Bootable Disks: UNetbootin - ISO to Bootable USB Drive; Sept. 8, 2010 AllBootDisks: AllBootDisks ISO Image Downloads UNetbootin Help Desk Geek: How to Change the Boot Order.

Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.

For IBM-specific releases, please see the IBM PC-DOS product page.

Release notes

Microsoft intentionally skipped '6.1' to prevent confusion with IBM's independently produced PC-DOS 6.1. Microsoft also made a free/inexpensive 6.0 -> 6.2 step up kit available.

This update corrects some major bugs in DoubleSpace, introduces ScanDisk, adds automounting of compressed floppies, and a tool to uncompress DoubleSpace compressed drives.

Installation instructions

The non-upgrade versions can be installed on a blank drive or overwrite any existing DOS.

Ms-dos 6.22.iso Image File

The regular upgrade versions can only be installed if a previous qualifying DOS is present, and provides an uninstall option.

Ms Dos 6.22 Iso File

The 6.2 Step-Up will only upgrade from MS-DOS 6.0.