I tried all those and regedit tweaks. No wakers listed in powercfg,… And actually none of the articles point to a case where the user has a HDMI switch/hub to allow two computers share the same monitor. Finally I figured if you unplug the HDMI switch from computer, SSD led and CDROM finally turn off. When the HDMI switch is plugged, it seems that electricity keeps flowing and causing my disk and CDROM to be on all the time, that can give you the impression Windows didn’t shutdown.