What should I do if the USB device in the win7 computer cannot be recognized?

When it comes to USB devices in the win7 Ultimate system, perhaps many people first think of devices such as USB flash drives and mobile hard drives, but in fact, the USB devices in our win7 Ultimate system are many. And many of them are used when we operate the computer on a daily basis. For example, our familiar mouse and keyboard, there are USB excuses, as well as our external printer, external drivers, etc., these are achieved by plugging in the USB interface. But recently, users who use the Win7 Ultimate computer have said that they have not been able to recognize the USB device inserted in the Win7 Ultimate computer. So how do we solve this problem? Below, Xiaobian will introduce it in detail. !

The first case: insufficient power supply for USB devices

Many USB devices have very strict requirements for power supply. If the current output cannot meet the requirements of USB devices, it will appear. Similar unrecognized situations, you may wish to try a different USB interface to see if it can be identified.

The second case: USB interface is damaged

In this case, we can also troubleshoot according to the USB interface.

The third case: the system is not compatible with the motherboard

This kind of fault can be done by installing the motherboard-specific USB2.0 driver patch, and then refreshing the BIOS settings, so that the system can be generally Compatible with the motherboard.