This driver set is for the Elsa Microlink 56K USB modem. It contains drivers for Windows 98, ME, NT, 2000, and XP. File is self-extracting when double-clicked and will extract files to a default folder (c \56k-usb-all) on your hard drive. Each file is self explanatory by it's name. Just chose the the correct file for your os. eg Windows 2000 driver will contain the letters '2k'.