now, I didn't find a solution but Google did lead me here. I have the exact opposite problem right now. (Only started today)
I used to keep my taskbar hidden but because I need to access it through teamviewer using a macbook, I've decided it is easier to unhide the taskbar while I'm away from home (instead of learning the windows key on a Mac).
Thing is, a little while after unchecking the box, explorer seems to "refresh" and my taskbar hides itself again. Looking at taskbar behaviors and I see the option checked by itself again.
A quick check in event viewer yields the following errors.
Personally it's still bearable whether the taskbar hides itself or not, but now I'm kinda worried there's a bigger issue looming.


