Windows 8 system Bluetooth device shows how to solve the exclamation mark.

Computer and mobile phone pairing will automatically scan and load the Bluetooth device driver according to the Bluetooth function of the mobile phone. The Windows system only has common service drivers such as Bluetooth file transfer and Bluetooth audio, such as Bluetooth for Nokia. For more mobile phones, after the connection, the device manager will appear that some Bluetooth peripheral drivers cannot be loaded and the exclamation mark is displayed.
This problem can be solved by disabling special services or downloading and installing drivers separately. The Bluetooth transfer files, Bluetooth audio and Bluetooth remote control function services that are commonly used after disabling the service are not affected.
Operating steps:
1, open the control panel -> device and printer (the control panel under the "category" view under the "hardware and sound" under "Hardware and Sound", "View devices and printers", 2;


2, right click and select properties phone connection as shown below:

3, the special services uncheck, file transfer and audio. It is commonly used, others can be canceled. The illustration is a Nokia mobile phone cancellation service, for reference.

4, after the setting is completed, click “OK” button, other devices in the device manager "Bluetooth Peripherals are gone.

If you need to use these features, you can download the corresponding driver or random software from the mobile phone manufacturer's official website. General mobile phone manufacturers will launch a PC suite. For example, Nokia website for each The PCs are available for download on a model computer. The peripheral drivers are displayed after installation on the computer, and the Bluetooth features unique to these Nokia phones can be used with the PC Suite.