After installing the latest Windows 10 Fall Creators Update I noticed that my Dell XPS 13 2 in 1 immediatly restarted after a shutdown. After some troubleshooting I noticed many other people with the same problem (also with other Dell models). The steps I found on the internet (BIOS upgrade, removing USB devices etc) didn’t work for me. But I found the solution :
Go to Energiebeheer (Power management, sorry for the Dutch language :-))
Go to “gedrag van de aan/uit knoppen bepalen” (behaviour of on/off button).
Select the first option (with the UAC logo next to in) en disable Fast boot. (Snel opstarten)
Voila! Problem solved.