Your best bet might be to go here
https://www.microsoft.com/en-us/software-download/windows10
Use the Media Creation Tool to download the ISO to a folder on the problem computer.
Once the download has completed, browse to the location where you saved it, double click it to mount it as a virtual drive and then
Run setup.exe from that construct to perform the in-place upgrade on your machine.
You should also disconnected any unneeded peripheral, leaving only a USB connected keyboard, USB connected mouse and a single monitor.
No wireless / Bluetooth adapters.
You should also probably empty the current contents of C:\Windows\SoftwareDistribution folder and delete leftover remnants of previous failed attempts such as any
windows.old folders as well as and hidden folder that will likely look something like this
$Windows.~BT
in the root of C:
NORMAL DISCLAIMER: Backup all critical data AND create a disk image of your current install so you have a strong fallback option.