How does the win7 system Bluetooth peripheral display the exclamation mark?

Problem Description
The user said that after using the Bluetooth mobile phone to connect the notebook, the Bluetooth peripheral device cannot be driven in the device manager, and will appear after manual deletion.



















As shown below, but some mobile phone services and drivers are not recognized by the system.

This problem is caused by the operating system integrated driver can not identify the phone's firmware and channel driver, right click to use the automatic update search driver to try, if still not valid, indicating that this Bluetooth device can not communicate with the computer or some These channels are limited. Please replace the external Bluetooth device or upgrade the firmware.
If you want to remove these devices for identification, the operation method is as follows
Solutions
1: Right click on the Bluetooth icon in the lower right corner and click to display the Bluetooth device

2: Right after pairing the Bluetooth device Click Delete Device and the Bluetooth peripheral disappears.