After my last post, I searched the error code last given in WU and found one step previously not tried: DISM.
I ran this and immediately after was able to update from 1609 to 1703 as well as other...

Update:
Immediately after posting last update, went into WU to see the update 1703 ready to be installed, not after restart, but from within W10. So I hit install. Got to 50% and see screen shot for...

As an update since yesterday:
Used Macrium Reflect to make sys disk image (20 disks)
Tried to boot in safe mode by hitting F11 and power button (per user guide) and was given the option to use...

I have been following this thread and attempting the .bat file fix with no success. Previously I was alerted something was wrong as the disk usage is always 100%. Checking for errors and scannow...