Event viewer always has errors in it, I wouldn't worry too much about them if PC is working fine
You’re sure to see some errors and warnings in the Event Viewer, even if your computer is working fine.
The Event Viewer is designed to help system administrators keep tabs on their computers and troubleshoot problems. If there isn’t a problem with your computer, the errors in here are unlikely to be important. For example, you’ll often see errors that indicate a program crashed at a specific time, which may have been weeks ago.
You got a bite on tenforums but its just saying there isn't a lot around about this event. Its possibly related to a change made in last windows 10 update, there is a new version of Win 10 next month so they might be doing some preparation ahead of time.
try updating your graphics drivers - https://forums.anandtech.com/threads/issue-with-closing-system-on-windows-10.2495427/
If you turn off fast startup it may fix this as well: https://www.tenforums.com/tutorials/4189-turn-off-fast-startup-windows-10-a.html
and set PC to never hibernate - https://www.tenforums.com/tutorials/2859-enable-disable-hibernate-windows-10-a.html