This Logitech Mouse Driver supports Win98/95, Win3.1 and DOS OS's. According to the readme file, it works with all Logitech 3 Button Mice,TrackMarbles, and maybe others. This zipfile contains floppy Disk#1.Zip & floppy Disk#2.zip. If you have Win98, install per instructions for Win95/98 - the DosPrompt window will support the mouse provided your Dos Appl. supports a mouse. Hope this helps.