If the update fails, do a clean install by booting from the disc or stick you make from the media tool.
I cant seem to whatever reason update my computer to the newest version which is 1903. It doesn't even pop up when i check for updates. I am currently on 1803. When I use windows 10 update assistant or media tool the update stops at 60% at the first phase and says its missing a component. If anyone has any solutions please let me know, I've tried almost everything. I've been with a windows support adviser for the past 12 hours and he doesnt even seem to know what the problem is.