Installing this driver worked for me on my Dell Studio XPS M1640 with 370 card:  support.lenovo.com/.../ds031999 
I have Dell Studio 1555 and need the Dell 370 Bluetooth Mini Card drivers for Windows 10. BT is not being detected in W10 and the device manager shows no odd entries. I tried to install the drivers from Dell website but they cannot be installed even in compatibility mode. Kindly provide the same.
Dell 370 Bluetooth drivers for Windows 10