Quick guide to update SM801. Download latest rs232 file from web site , Copy to CLEAN usb stick. Put stick into USB socket under front flap of SM801. Select USB from remote. CHoose STB FILES. Select the file on the USB STICK. Press RED button to start upgrade. This will take a few minutes then the box will reboot and will have to scan channels again. TIP:, to enable the DOLBY goto AV settings under SYSTEM SETTINGS MENU, (the bottom left PIN - Menu) you will have to scroll down to se AV SETTINGS.