Now I have to write something to it. This small but mighty fax modem simply plug into an available USB port Computers. Under Windows 8.1.1 or Windows 8.0, it is recognized immediately as the driver in Windows is integrated. Only problem is the Windows version 8.1.1 in the integrated fax & scan has a bug and is not working. But it also works no other fax modem as it is on Windows, not the driver. In Windows 7 and Windows 8 everything works flawlessly. Now for Windows 8.1.1 I use another fax program that works flawlessly with it. If the fax modem does not work so under Windows.8.1.1 as it should, then please change the fax program. The hardware itself from the fax modem and the drivers are working. Great fax modem at a low price with very good processing (halt DELL) On the driver CD are included with all drivers for all popular operating systems. The drivers for Windows 7 32/64 are valid and certifiziert for Windows 8.