I don't believe there is a legal download for DOS 6.22, or any other version of MSDOS for that matter. You may find what appears to be a download for DOS 6.22 on the Microsoft website but this is actually an upgrade from DOS 6.2. It will not install by itself.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Purch hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.
PLEASE READ THE FULL DISCLAIMER AND LEGAL TERMS BY