I'd tried that. It refused to acknowledge that the BT adapter existed.

Eventually searched the web to discover that Dell drivers for the Broadcom BT adapter were never updated to be Win8/Win10...

Just realised that, since I upgraded from Win 7 64 Home Premium to Win 10, it has not detected the laptop's Bluetooth device. It doesn't even feature as a device in Device Manager ... not even one...

May not be your problem ... a friend cured his SERIOUSLY slow startup by not having his Samsung SSD encrypted.
Good luck!

Ah - sorted!

Clear Page File was 0 ... left at that.

Disabling Fast Startup was the key.
Shutdown is now as it used to be! Yay!

Interestingly ... Startup is only 2 seconds slower with Fast...

Recently upgraded direct from Win7 64 Home premium to Win 10.

Basically everything seems OK .... other than shutdown.

Booting is about the same, if not a tad quicker, than Win7 ... and comes in...