From your Windows device manager select the current serial COM port (which may have a yellow triangle by it) for your DMR-6X2 (it will only appear with the radio connected to the computer. The included cable is a pass through cable and the radio is contains the communication chips)

Right click on the device and select update driver.
From here select the Direct_ISO_Installer Folder you just downloaded located in the DMR-6X2 folder: .../DMR-6X2-102/Alternative_USB_Drivers/Direct_ISO_Installer

Windows will install the driver associated with the radio, and this should remove further issues
