Microsoft MS-DOS 6.22 (Upgrade) Released in 1994 by Microsoft For IBM PC compatibles with MS-DOS This is a full upgrade to MS-DOS 6.22 from any earlier version of DOS. To run, insert disk 1 into your A: drive, switch to the A: drive by typing: A: at the prompt. Then, type: SETUP and press and follow the instructions. There is an oversight in this disk set. For some reason, MicroSoft failed to tell Setup to include the DOS command "UNDELETE.EXE" in the copy process. After installing, you will need to manually copy "UNDELETE.EXE" from disk 10 into your DOS directory. MicroSoft was advised of this oversight, but, saw no need to re-issue the disk set, probably due to low demand at the time. Archive includes thirteen 360k 5.25" floppy disk images.