Hi,

I have a Dell XPS 15 9560.  Until recently I have been using a Logitech MX Anywhere 2 mouse which is paired to the laptop's bluetooth (BT).  A few days ago, however, I noticed the mouse did not work.

On further investigation I found that the laptop's BT was not on and the button to activate it had disappeared from the windows 10 action centre panel thing.  I have checked the device manager and the BT section has disappeared; on viewing hidden items there is no BT hardware entry.

I recently updated some drivers following an notification from the Dell Update service. It seems very likely that the updates and loss of BT are related.  The updates were primary Intel chipset related stuff (I cannot find an update history in the Dell Update software so I'm not 100% sure).

I tried to use system restore yesterday from several previous points created over the last few driver and windows updates, but all the restores failed.  I tried also to do the restore by booting windows into troubleshooting mode; same result.  Checking again today, and now all the system restore points have disappeared so that option is gone even if it had worked.

I tried to do a check using the Dell diagnostic software but it says there is no BT hardware to check.

I got the latest BT drivers directly from Qualcomm (10.0.0.309) but their installation made no difference.  I also reinstalled the drivers using Dell Support (Killer Wireless AC Driver 10.0.0279) - no joy.

I tried rolling back to the previous 'Intel(R) Management Engine Components Installer' driver to no avail. Going back to the latest (11.6.0.1047) also changes noting. I suspect this driver merely implements all the other intel sub-component drivers and that they may need to be rolled back, but I haven't a clue where to start and I'm not even sure what these drivers do.  

All other drivers are up to date according to the Dell Support software.  All Windows updates have been installed.

I'm frustrated. In addition to this problem I previously had to seek out separate Intel graphics drivers to stop the stuttering problem.  I do not feel I should have to be spending an inordinate amount of time doing this sort of thing for a premium, relatively new (bought in Match) off-the-shelf computer.  Do Dell not check drivers before rolling them out through Dell Update?

Can anyone help?

-Dave