Mounted ISO file, disconnected from internet, started install, but have same issue I had when using WU... stuck at 90%. The Dell Inspirion 15 i'm trying to update has no DVD drive, so i'm thinking I need to try and install from flash drive, but not sure how to proceed. I read in the forum about using Rufus to create bootable flash drive. Is there an instruction to help me configure bootable flash drive to install Windows 10 feature update 1903 downloaded from HeiDoc.net?