However, Microsoft was sued by Stac Electronics for patent infringement over the compression technology. Microsoft lost. Consequently, they released MS-DOS 6.21 without compression, and then quickly followed up with featuring a newly written, non-infringing compression tool called DriveSpace .
A pure CLI (Command Line Interface) that gave users direct control over hardware. Where to Legally "Download" MS-DOS 6.22 ms-dos 6.22 download