Later today, I will have a system with the same motherboard and processor as you.
I will not have an Nvidia card, however. Have you thought about removing its drivers, and uninstalling the card and just use the onboard video?
There should be some logs in an $windows type of folder, which may be hidden. I understand a Rollback folder may hold some logs you could check, setupact.log and setuperr.log might give you some clues....
You won't like this, but my board upgraded with no problems.
I was told to uninstall the Intel USB 3.0 controllers, the Asmedia USB 3.0 were not mentioned. Also Microsoft Security Essentials needed to be uninstalled.
My system is not very complicated, and I have no external devices, except the Mouse and Keyboard plugged in...
I have to laugh though, about your saying it was failing at 96%. I must have seen 6 or 7 percentage markers during the upgrade. The last one was Moving Settings, since I chose to keep everything. But on the initial screen, it does go from about 90% and reboots suddenly. Some stages do take some time to complete, and if your system is more complicated than mine, it may take quite a bit longer.
Later today, I will have a system with the same motherboard and processor as you.
I will not have an Nvidia card, however. Have you thought about removing its drivers, and uninstalling the card and just use the onboard video?
There should be some logs in an $windows type of folder, which may be hidden. I understand a Rollback folder may hold some logs you could check, setupact.log and setuperr.log might give you some clues....