The "Bluetooth peripherals" that are not installed in Device Manager display an exclamation mark or question marks.
1, to open the "Control Panel" in the "Device and printer";
2, find the "equipment" in the once-linked Bluetooth device Click the right Button "property";
3. Select "Hardware" to see the "Bluetooth peripherals" that are not installed properly;
4, select "Services" to see the device supported by the functions required by the services, the installation of Bluetooth peripherals is because these services are not installed successful drivers, the device to find the Bluetooth driver after installation. Or use the method in the following figure to cancel a portion of the functionality, and then no longer appear in Device Manager.