USB interface is a serial bus standard connecting computer system and external devices. It is widely used in information communication products such as personal computers and mobile devices, and extended to photography equipment, digital TV, game consoles and other related fields. When you use notebooks, you will often encounter the problem that the USB interface of notebooks does not respond. Let's take a look at what to do if the USB interface of notebooks does not respond!
Caused by improper human operation
The failure of the USB interface of the notebook may be caused by improper human operation. The reason may be that the system is just using USB when shutting down and unplugging the USB cable, that is, the USB has been disconnected before the system reacts. It may also be that the shutdown is too fast and windows is forcibly shut down before some programs or services are shut down. This may cause the situation that USB cannot be recognized when you start the next time (not just one port, but all may not), and the reinstallation driver may not be recognized. However, Windows 7 system generally has automatic repair function, and the problem can be solved by restarting it once.
The BIOS setting disables the USB function
One item in the BIOS setting of the computer motherboard is to set the USB switch. The default value of this option is on. However, if you are not careful or the BIOS setting is wrong, the USB interface may also be disabled. You can check whether the BIOS setting disables USB. You can restart the computer, press and hold the Del keyboard on the keyboard, and then enter the BIOS setting. Find the USB setting item in the interface, and then check whether it is disabled. Since the BIOS settings are in English, you can check them directly on the Internet if you don't need them.
The USB interface is damaged or the motherboard is faulty
If the USB interface fails on the motherboard or the USB interface fails on the motherboard. If it is really the problem of the motherboard, the problem that the USB interface cannot be used can only be solved by repairing or replacing the motherboard.
USB service is disabled
If this service is not set, this will not happen, but there are special cases, that is, many people have some optimized anti-virus software installed on their computers. When using these software, the USB service can be disabled. At this time, you only need to unblock the USB service. Open the anti-virus software installed on the computer and check whether the "system plug and play service" is disabled. If it is disabled, the USB interface on the computer may not be used. At this time, we can open the "open optimization service" in the anti-virus software and then unblock the "system plug and play service".