What to do when the computer does not recognize the keyboard and mouse?

It is usually quite easy to determine if the problem is caused by the keyboard/mouse or the computer. If plugging the keyboard/mouse into another computer and still receiving and using it normally, the problem lies on your computer/lapop. 


Sometimes, they still connect to the computer because you press the CapsLk or Num Lock button and the lights are still on, but the other keys don't work. When you encounter this error, you can refer to some ways to fix it below.

1. Restart the Computer

Restarting the Computer

When you encounter this error, unplug the devices and restart the computer, this is the most common way that anyone can do when encountering basic errors. Restarting the device will help your computer scan the entire device inside of the machine, then maybe the USB ports will be able to operate smoothly and "better" and overcome the situation of not recognizing the mouse. and keyboard.

2. The USB port on the computer is poorly connected

Due to poor contact of the USB port on the computer

The computer after a long time of use, the USB ports will be full of dust and rust, etc., leading to poor contact. In this case, cleaning the USB ports will help better contact.

3. Because the USB port is locked

Due to the USB port being locked

During use, you may accidentally lock the USB port or let the children in the house use the lock without even knowing it. When encountering this situation, you need to fix it as follows: First check if your computer is correctly locked USB port or not, if true, you can proceed to open the USB port by doing the opposite. instructions in the USB port key of the Network Administrator to restore it.

4. Your computer lacks Driver

This cause is also quite common because many times after reinstalling Win, they forget to install the Driver for you or it may be because the Ghost version has been tweaked and omitted quite a lot. To fix this error, the simplest way is that you can go to Google and download any Driver version to your computer and reinstall the missing Drivers. You can use Driver Easy software to scan and download the missing Driver.

5. The computer is infected with a virus

Because the computer is infected with a virus

A computer infected with a virus is a disaster, if you are a beginner to this device, it will be very easy to be infected with malicious virus codes, they can destroy or even destroy documents. and your computer. So, if you suspect that your computer is infected with a virus, install anti-virus software to scan your computer for viruses. After scanning and anti-virus still does not fix the problem, maybe the computer has been infected with a virus too badly, reinstalling Win will be the best solution to fix this error.

6. Due to Hardware Damage

If the keyboard and mouse when plugged into the computer you do not recognize, but with someone else's computer, it still works "fine", the final cause may be that your USB port is faulty. With this error, you can bring the computer to a service center or a reputable computer repair address so that they can fix it and replace it with a new one for you.

7. Due to power failure

The machine does not recognize the mouse and keyboard may be due to a power problem

The machine does not recognize the mouse and keyboard may be due to a power problem

If you're setting up your computer but the CPU can't recognize the keyboard or mouse, you're probably experiencing a power issue. You can do the following to work around this problem.

  • Remove the CMOS battery, which can be placed at the top of the motherboard, reinsert it and see if that fixes the problem.
  • Remove Powercord for 30 minutes, turn it back on and see if it fixes the problem.
  • Change the PSU: The PSU (Power Supply Unit) converts the AC into the low voltage DC that your computer's internal components need. Therefore, if it malfunctions, no external devices will work.
  • If you can't fix the problem, try to attribute the fault to a specific component, by removing each removable part such as extra hard drive, RAM. Many users were able to fix the problem by replacing the RAM.

Hopefully with a few of the above methods will help you find out the cause and how to fix the laptop error that does not recognize the mouse or other peripherals through the USB port.

Wishing you success! 

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