I had a few updates for my Inspiron 5570 and this was the only one that failed to install/update.
A black box appears (which I believe to be system file checker) and doesn't do anything. Just the box with the little white "-" that blinks.
The download bar for the update had reached 91% at this point and did not move for the 5 minutes I waited. Nothing happened until I exited out of the system file checker.
I've tried this a few times and still nothing happens with the black box. It just pops up and doesn't do anything else.