For the earlier versions of Windows (8 / 7), the *.inf file is needed for proper device driver activation. The status can be checked in the Windows Device Manager. If the yellow exclamation mark is displayed, the driver is not properly installed for the device.
The update should be required at first connection of the ForceFeel, or you can update the software driver in the Device Manager later. To update a driver with the provided file (realteus2.inf) yourself, please refer to the following link: