Well that's bizarre.
The last thing I can think of to try is to enable the "Disable fullscreen optimizations" compatibility setting in the properties window for the executable and make sure Windows is all patched up.
Still doesn't work. I'm a little behind on Windows updates, but I'm really not willing to fix that, because if I update, it'll undo all the hard work I put in to keep Windows from restarting my computer while I'm away from it.
I've not gotten this error before with other Unity games, so I'm not sure what's going on either.