How to Resolve Issue with Windows 10 Crashing at 70% When Updating to Version 1903

After lots of trail/erroring, googling, and reading, this is the solution that worked for me and allowed me to update Windows 10 to version 1903.

Download the Media Creation tool. As of October of 2019, it can be downloaded via https://www.microsoft.com/en-us/software-download/windows10. This is the download associated with "Create Windows 10 installation media".

After the download, run the program. I am actually doing this for a Virtual Machine (Virtual Box), so I opt to create an ISO using the tool. After the ISO is created, I mount it and run the setup program associated with the ISO image. The prompts are relatively straightforward, and I just select the update option.

The program then just updates and reboots, and voila, I am upgraded to version 1903.

If I am doing this for a future update, I might need to download the tool again. The medial creation tool exe file seems to be associated specifically with version 1903. I.e., MediaCreationTool1903.exe.

Ref: https://answers.microsoft.com/en-us/windows/forum/all/cant-install-windows-1903-update/8b1fccf3-18f6-42c1-aeff-8add33c2f85d