XPS 13 9360 Bluetooth stopped working w/ microsoft designer mouse

[murielfu]

my OS is win10 1703 with latest windows update,

random time after using for a while, the Bluetooth device will disappear in device manager and become unknown USB Device and the Bluetooth could not be enabled

anyway to fix this issue? 

[dell-robert p]

Hi murielfu,

Thanks for posting.

Apologies that your computer is not working as expected.

Have you tried any troubleshooting to see if there is a hardware problem?  You can run diagnostics by pressing F12 at startup or by running Dell Support Assist.  Please make a note of any error messages you encounter and post back.  Another idea would be to uninstall the device and the wifi card, then reinstall it.
Here is some information from the Dell Knowledge Base you may find helpful.