Version: Compact Wireless-G USB Network Adapter with SpeedBooster 4.01.20.0
If you use Windows XP this will work.
These drivers don't work with anything newer than Windows XP. Since not even the Linksys manufacturer bothers to update the drivers for this hardware, I'd recommend trying to get your hands on a copy of the Vista driver which is compatible with Win 7, 8.1 and 10.
If you use Windows XP download this, otherwise it's a waste of your time.