This file is a Windows executable which updates the firmware to 1.0s. I have used it successfully on Win2000 Pro to update from 1.0c to 1.0s. The app is meant to work with Win98/ME and (possibly) XP. I experienced similar probs as reported by XP users with the other 1.0s driver file on this site (it would recognise the drive but not update it) so maybe (!) this file will also work with XP. XP users may wish to report back their experiences.