After I reboot the system I saw under BlueTooth in the Device manager:
Generic BlueTooth Adapter
Microsoft BlueTooth Enumerator
Microsoft BlueTooth LE Enumerator
In network adapters I saw:
BlueTooth Device (Personal Area Network) #2
Bluetooth Device (RFCOMM Protocol TDI) #2
Intel (R) Dual band Wireless-AC 7260
etc etc etc
and some "unknown USB device" disappeared from the USB controllers list.
I just hope the installed "generic driver" will be compatible with Bluetooth 4.0.
So far I have been able to pair my cell phone with my PC. I might get another Bluetooth device to work with my pc.
I agree... Intel must provide better drivers. So much suffering we got...
Thanks