It's happened twice now. The first it seemed like windows update was doing stuff in the background. It hit 100% CPU usage on a 6700. That should basically never happen. It eventually cleared up 20-30 mins but was rough going till then. Today it got stuck at after a windows 'full' update (blue screen with text) Saying Configuring New Features 100% for about 10 mins. Is there a known issue with Win 10 updates?

Basic Specs FWIW
i7 6700
GTX 1060
16 GB DDR4 2400
SSD 250 + 1GB HDD