MS-DOS is a System Utilities software developed by Stylet Software. After our trial and test, the software is proved to be official, secure and free. Here is the official description for MS-DOS:

Ms-DOS is still very useful. In addition to the many features of its own, DOS could also solve a lot of problems that can not be solved in Windows and other system

Microsoft MS-DOS 6.22 Step-Up files. Also available in the following languages:

French (stepfrn.exe)
German (stepger.exe)
Portuguese (steppor.exe)
Spanish (stepspa.exe)