Win7 32-bit system USB Interface not responding cause analysis and solution

1, the USB service is disabled: If there is no problem with the previous use, then it is possible that when users use such as Kingsoft or 360 Security defender Optimization System, accidentally disabled the USB service (System Plug and Play service is disabled), the USB interface is not available.

Solution: Check the Golden Hill Guardian or 360 security guard boot optimization service items, check whether some critical system services have been disabled, found the boot, or use Jinshan Guardian optimization recommendations.

　　2, some computer chassis front USB interface is not available , in the installed time forgot to connect the chassis USB interface cable to the motherboard, so that the front of the chassis USB interface can not be used, to try to connect the USB interface behind the chassis, the rear USB interface is provided by the motherboard, General can solve the problem;

　　3, USB interface damage or motherboard failure: If the above situation has not ruled out the problem, then you need to pay attention to USB interface failure or equipment failure, it is recommended that you can take a few more USB devices to try, if more than one device, such as mobile phones, u disk, etc. can not be used, Or someone else's computer can use, their own can not be used, it is possible that the USB interface is damaged, we can try to change the host after another USB interface to try, if still not, it can basically determine the motherboard is a problem, it is recommended to take maintenance.

　　4. The USB function is disabled in the BIOS setup: By default, the USB control switch is on in the motherboard BIOS, if the error setting BIOS or BIOS errors may cause the USB interface to be disabled, if the above problem is excluded, It is recommended that you check the BIOS settings to see if the USB is disabled. Workaround: When restarting the computer, always press the Del keyboard to enter the BIOS settings, and then find the USB settings item to check.