G Modem errors before installing any driver updates. Toshiba All Drivers Driver. WinTVHVR series external USB TV tuners. WinTVHVR935HD. WinTVHVR930C WinTVHVR900. WinTVHVR1975. WinTVHVR1400. WinTVHVR1950 WinTVHVR1955.