Once all file successfully installed on your computer, Then put your LG V10 Smartphone into download mode, you can manually do it by.At last, Install LG DLL file that supports with your LG V10 smartphone.Then, Install the latest LG UP software (this software run on most Windows operating system versions).Download firmware or stock ROM on an item no 1 or 2 or 3 above, save it on your computer drive.You can flash or install Stock ROM or Firmware on LG device using LGflashtool2014, but on this guide, we will show you flash LG device using LG UP, This is the new official tool from LG to flash LG V10 device.