Remove the USB cover from the M12 and connect the radio to your computer. Switch the transmitter on. If your PC asks for a suitable driver after switching the M12 on, click on your PC’s start menu and enter “Device Manager” into the search function. Open the Device Manager. At the point “Other Devices” you’ll find the “CDC USB Demonstration”. Click on “Update Driver” and then on “Browse my computer for driver software”. Select the folder where the file “SANWA-M12.inf” is saved. Click on “Continue” and install the driver. The M12 will be recognised by the PC now