My system just updated to the latest 1607 version (aka Anniversary Update). As mentioned in my Post 348, I firstly unplugged the Optical Drive and all USB devices before the update. The process went smoothly and took about 30 minutes to complete.
Had a flight for another half hour and found no problem in either software and hardware. Can’t say my system now runs better with the update but the opening of some programs do get faster. Surely, some follow-up tunings are required for personal taste. But overall, I am quite happy with it.