Despite the recent inclusion of new automatic troubleshooting and problem-solving tools, the version 1809 update for Windows 10 introduced quite a few bugs. One of the latest (and more annoying) quirks is an issue that prevents your computer from shutting down or going to sleep in a timely fashion.
from Lifehacker http://bit.ly/2X87V4I
http://bit.ly/2IIRZgz