SOLUTION  ▷ “The USB device is not recognized”

USB device was invented in the early 2000s, it is a removable storage medium where you can store all kinds of files: photos, videos, music, work files such as pdf, text documents or spreadsheets. Therefore, it is not a fixed storage device like hard drives installed in a computer.

Also, it is known as flash memory, it is a portable storage device that is connected to a computer through a USB port. And its acronym means Universal Serial Bus. Flash memory is semiconductor, it is not volatile, that is, it is a memory that has the characteristics of a RAM, but whose data will not be lost when disconnected from the PC.

Pendrives came to replace floppy drives and Zip devices. Since its storage capacity is much higher. The practicality of this device is that they are small, for this reason, you can easily carry it in your pocket, around your neck as a necklace or on a keychain. That said, we have prepared for you a step-by-step guide so that you can solve the famous error yourself “USB device not recognized”, which is very common on Windows desktop and laptop computers especially.

Steps to know what to do when your Windows PC does not recognize the USB device

We know that our device does not work when, when inserting it into the USB port, the drive does not appear in the “My Computer” folder. Sometimes it may take a while to appear, but if the operating system recognizes it, a folder always appears, surely with a D, an E or some letter and the name of the manufacturer. Upon entering that folder, we find the files on our external memory.

In this sense, when you connect the external memory unit to your computer, you may receive an error message: “USB device is not recognized”– One of the USB devices connected to the computer is not working properly and Windows does not recognize it, and you probably have no idea how to solve this problem. Don’t worry, that’s why I’m here, I’ll guide you through a series of simple steps so that you can solve this situation. Let’s get into the matter:

1 – Connect and disconnect the USB

The first thing you should do, dear reader, is to connect the flash memory to the USB port, and see what response the computer generates. For that you must go: to Control Panel> Systems> Device Administration and verify whether or not it recognizes the pendrive. If the message displayed on the screen is: “Unknown USB device (Device request error) “, I recommend that you do the following:

  • Uninstall the driver.
  • Then reinstall the driver again.
  • Finally, reconnect the USB device.


If the error persists, I recommend applying the CHKDSK command by console to test the external memory unit. Do the following:

  • Go to the start menu then search and then type the command CHKDSK D

    (* Note: D is the USB drive) will depend on the port number that the pc has. Then you must click to execute the command.


  • A black window will appear and you just have to type in the letter S and hit the intro, and the diagnostic process will begin. Here you will check if the flash memory is in good condition.


2 – Update the USB drivers

When a driver is out of date, its functions can be seriously affected. Fortunately, Windows has a wizard that not only helps you with the installation, but also find the most current version of the driver for you.

  • For this you simply must enter Control panel> Systems, and once there select the option “Device administrator”.

flash drivers Device Manager

  • Then select the controller and right click on update driver.


  • If everything is fine, your connected “memory stick” should appear correctly and ready to use.

3 – Check the RAM memory of the PC

This review will allow you to verify if the main memory of the equipment is operating correctly, since if it presents a fault it can affect the operation of this unit. For this you must make this diagnosis.

The first thing to do:

  • Go to the home screen, then search and type the following command “MDSCHED “.

mdsched Windows command

  • Then click on “Windows Memory Diagnostic “, the following image will appear:

I diagnose external memory

  • Here, you must select where it says “Restart now and check for problems (Recommended) “. After that, you will see the following message on your screen:


  • Next, you must finish the diagnostic process and implement another test option, you must type F1, when you do this you will have three more options to choose from:
    • Basic Test
    • Standard Test
    • Extended Test


In addition, you have the possibility of carrying out other tests and configurations with different parameters:

  • Cache test: Here you can choose between the Default, On or Off option.
  • Step count: The number of times you want to repeat the test.

To do everything that I explain, you must manipulate the arrow keys to select the option and type F10 to start the test process.

Upon completion, the tests automatically, the PC will restart and if it finds an error in the RAM, it will show you the result.

4 – Idle the suspension system

One of the causes could be that the suspension system selective operating system is off or idle.

This happens when Windows has activated the option to reduce the power supply to devices that are not working. Generally this happens when the user decides to remove the pendrive abruptly, causing the system for protection to disable this option.

What you are going to do is the following:

  • Going to go to Control Panel> Power Options> Edit Power Plan Settings.
  • Enter the operating system power options, right-click on “Start” and choose entry “Windows Power Options “. Here, you will simply change the power plan that is activated.


  • In the other pop-up window, you should click on “Change advanced settings of energy “. Then it will show you a new configuration box where you will choose the new power plan.

Take precautions against unrecognized USB devices

Finally, if it takes you a long time to solve the problem that the PC does not detect the USB device. I recommend you make one backup with free software. AOMEI Backupper Standard allows you to automatically backup files to an external hard drive.

There are 4 modes available to choose from that you can choose according to your need:

  • Daily mode
  • Weekly mode
  • Monthly mode
  • Event trigger mode.


Finally, there are other causes why your computer may not recognize a PenDrive device. Your duty is to make sure and do these tests:

  • The pen-drive may be damaged; To find out, you plug it into another computer to see if it recognizes it. If any internal component is damaged or has been bumped, you may no longer recognize it.
  • Maybe you have not inserted the USB correctly: sometimes it may be that you have not placed it correctly in the connector and for this reason your operating system does not recognize it.
  • Maybe the entrance or port has a fault– Maybe there is a hardware problem and the port is not working.

If you have any questions, leave them in the comments, we will answer you as soon as possible, and it will also be of great help to more members of the community. Thank you! 😉

You may be interested:

Rate this post

Leave a Comment