Windows 10: Install stuck at 75%

I had a similar problem with my PC stuck at 82% and no matter what I did from the control panel or the windows 10 settings nothing worked. This worked for me.
First down load "Driver Booster" and make sure you get the free one, don't go for the red option (you'll see when your on their website" also don't opt for their speed up program unless you want it.
Having got Driver Booster run the program to update all your drivers, some of mine were 2013!!.
Once you've done that try to update windows again, but be warned it's a long long update so give yourself plenty of time and be prepared for the screen to go blank from time to time and for the update to jump to a circular screen part of the sequence. This was nice and simple, I like simple. Worked for me hope it works for you.