[NAME]  Maybe check to see if there are optional drivers in Windows Update. You could also try a 3rd party driver utility like snappy driver . I would use the full download let it download all the drivers it will be large about 25 GB.
I recently installed Windows 10 on my XPS 8700 system. It went better than I expected but after the installation was complete I found I had no BT (Bluetooth) at all. In device manager I do have: Other Devices / Unknown Device. My system has a Intel Centrino(R) Advanced-N 6235 wireless adapter (with intergated Bluetooth). Currently the driver is from Microsoft V15.16.0.2. from 06.01.2015.  When I go to Dell's drivers web page and look for bluetooth drivers for my system, I am offered no drivers for my own system. If I look for all XPS 8700 systems, I am offered a driver for  - Intel 3160/3165/7260/7265/8260/8265 Bluetooth Driver. When I go to Dell's drivers web page and look for wireless network drivers for my system, I am offered no drivers for an Intel 6235 on my own system. If I look for all XPS 8700 systems, I am offered a driver for - Intel 7265/3165/7260/3160 WiFi Driver - Dell Wireless 1704 802.11 b/g/n Wi-Fi Driver - Dell 1703 Wireless and Bluetooth Driver Can the community help me resolve this issue. Is one of the Dell drivers really an Intel 6235? Thank you in advance for any assistance. 
XPS 8700, Windows 10 installed, BT missing?