The USB driver is required for USB communication between the PC and the Bootloader and it creates a virtual COM port on the PC for this purpose. The driver must be installed on the PC for this (see „Installation“) and is automatically loaded when a Bootloader is connected to the PC. The required drivers are contained in the attached CD-ROM in the folder <\install\USB-Treiber>, can be downloaded from the homepage http://www.ta.co.at or can also be installed via Windows Update.