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How to Fix USB Device Not Recognized on Windows 7

Many times when we insert USB drives into the USB port Windows shows up a message that USB is not recognized by Windows 7 as it has malfunctioned. This error can happen if you insert mouse, pen drives, mobile phones or even digital cameras and as a result of this you will not be able to use it. Sometimes even after reinstalling the drivers, you still face this issue.

USB-device not recognized

How to Solve the issue?

Apparently there are many ways to try solving this issue.

STEP 1. Click Start-> Run and type Devmgmt.msc, and this will open up the Device Management. Click to select your computer as the location for the scan. Right click on the computer and click Scan for hardware changes, you can also do this from the actions menu.

Scan for hardware changes

Most probably Windows will be able to detect the problem and recognize your USB drive. In case you still face the issue, try step 2.

STEP 2: Click Start-> Run, type Devmgmt.msc, opening the Device Management. Expand Universal Serial Bus controllers and right click on the USB drive which is showing error or not recognized issue.


Select properties from the right click menu and select the Power Management tab. Click to clear the “Allow the computer to turn off this device to save power” check box, and then click OK. Now from the the Action menu, click Scan for hardware changes as mentioned in STEP 1.

Power Management

Windows will again start scanning for changes and it should be able to find out USB device.

STEP 3: If you are still not able to solve the problem, power off the machine, disconnect the USB, pull the battery (in case of laptop) or remove the power connection to PC (in case of desktop), and let it sit for about 10-15 minutes. Restart your PC and it should be able to detect the USB. In this case you are actually restarting the mother board by removing the power and this should solve the issue in most of the cases.

About Nirmal

Nirmal is a Technology Blogger and a Microsoft MVP in Windows. He can be contacted at nirmal@nirmaltv.com. You can find Nirmal on , and .


  1. Nirmal, is this Windows 7 only?

  2. why i cannot find the power management tab? general and driver tab are the only tabs present. pls help

  3. What Windows are you talking about?! There is no such thing “power management tab” in Win 7! Why are you misleading people?!

  4. This isn’t work problem is same for all the computer systems.
    I tried to connect my usb on different computer’s but the problem is still.

  5. HariomPaliwal@Kota

    The Windows error “USB Device Not Recognized” means that the computer may not recognize the USB device plugged into the computer. When this issue occurs, the USB device may or may not be listed in Device Manager as an unknown device.
    This issue mainly occurs because of several factors, which may include the following:
    • Host controller hardware malfunction
    • Incorrect USB driver versions
    • No support for USB 2.0
    • Additional system hardware or configurations that may change the timing
    • Attached hubs
    • Attached devices
    To work around the above issues, one of the below solutions could prove helpful:
    • Unsecure or Loose Connection
    Unplug the presently connected USB device (if any). It is quite possible that the connection is not secure and has become loose. Re-plug the USB device tightly and firmly into the USB port. This is one of the most common reasons for an error in detecting a USB device.
    • Scan for Hardware Changes in Device Manager
    Use the Device Manager to scan for new and recently installed hardware. From the Start menu, select the Run option. In the pop up box, type in Devmgmt.msc and then click Ok. From the Action menu, click Scan for hardware changes. This will make Windows scan & recognize any new devices that are installed. Now, close all opened device managers and control panels. Now, follow the above step and see if your computer detects the USB device.
    • USB Hub Power Management
    Disable power management of the USB hub. To disable the power management on the USB hub, follow these steps; Click Start, and then click Run. Type devmgmt.msc in the popup box, and then click Ok. Expand the Universal Serial Bus Controllers’ node, and then follow these steps for each USB Root Hub that is listed.

    1. Right-click the USB Root Hub and then click Properties.
    2. Click the Power Management tab.
    3. Click to clear the Allow the computer to turn off this device to save power check box, and then click Ok.
    Note: If you perform the following procedure on a laptop computer, you may reduce the battery life.
    Sometimes, simply unplugging the USB device and turning off the computer for twenty minutes and then restarting may solve the issue. If none of the above options have solved the problem, check the manufacturer’s website for new driver information. It is possible that your drivers need to be updated. There could also be a possibility of hardware failure, which needs to be checked by a hardware expert.
    I Hope this helps someone fix that pesky “USB device not recognized” Windows error!

  6. Any comment for someone who has tried all of these items and more and is still having the problem? All of my USB devices were working fine until this week. Now, they can be charged when plugged in but the computer will not interface with them (like the Itouch). The good news is that I have more than one device and it is doing the same thing to each and it happens no matter which of the USB ports I plug into.

  7. hey thank u so much, step1 working in my pc

  8. Just installed the newest automatic Windows 7 update and the USB devices are recognized again!

  9. Right clink on my computer and go to manage the when open click on device manager and go to USB Hu right click on it then will see power managemen click on it to disable then un tick the Allow the computer to turn off this device to save power check box, and then click Ok.then save.thats it u,re done.

  10. This is all very well for devices (keyboards, mice etc) but not USB sticks. These have a high failure rate and consistently come back with Unknown Device severely limiting the options (and tabs! – no power management) you have to deal with it.
    “Windows has stopped this device because it has reported problems. (Code 43)” is reported on many different machines. All the workarounds above (while possibly successful on other devices) seem not to work with USB memory sticks. I just wish the device would report (in a readable format) *what* problems it was having!

  11. Thanx HariomPaliwal@Kota

    Ur steps worked 4 me

  12. Xantes is right, not for Windows 7 64. NO tabs illustrated.
    No help here..

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