Is this the one where you get a box with a "Hard Error"?
I fixed it by grabbing the Update Assistant from the Windows site on another machine, copying to a USB stick, transfer the program to the C:\ drive and running from there in a command prompt (might have been an elevated prompt) called from Task Manager. It was a week or so ago, so there might have been a couple of extra steps, but that solved the issue on a machine here. Hope it helps.