I had just an interesting problem: after updating (or being updated) to Windows 10 creators update on my Latitude 5480 notebook I noted some days after, that my bluetooth mouse (Microsoft sculpt) did not work anymore. Looking closer my bluetooth icon was gone on the system. I tried first to update all that can be updated, i.e. first Windows Update, then the dell Command Update utility, but bluetooth kept invisible and could not be started. Finally I found the Bluetooth icon in the Device Manager and de-activated Bluetooth there. Then I activated it again and - oh wonder - Bluetooth started up again, and everything's ok now.

Maybe this helps somebody having the same issue.