Possible reasons are as follows:
1, the computer is infected with a virus, you can press the F8 button when you start, enter the safe mode, and use anti-virus software to kill viruses.
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2, Windows power saving function, restart the computer, the usb interface will re-identify the keyboard and mouse.
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3. The mouse and keyboard are damaged, replace with a new mouse and keyboard.
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4, motherboard USB interface failure, can only repair the motherboard or replace a new motherboard.
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5, Install WIN7 driver on the motherboard that does not support WIN7 can be used normally in the PE system.
First, because the Bluetooth connector and the computer interface may not be connected, you can remove and reconnect to improve, pay attention to wipe the interface;
The second is the driver problem, you can update the corresponding Bluetooth driver of the computer, and the small white can update it directly with software such as the driver master.
Third, the mouse may lack of power, for the mouse that needs to change the battery, put on a new battery, and charge the mouse to be fully charged.