Troubleshooting USB Port Recognition Issues

Having trouble with your USB ports? Look no further. In this guide, we’ll delve into troubleshooting USB port recognition issues and provide you with effective solutions to get your devices connected smoothly.

Fortect may address a computer not recognizing a USB port by repairing damaged system files or faulty settings.

Download Now

Check the USB port: Ensure that the USB port is not physically damaged or clogged with debris. Use a flashlight to inspect the port for any bent pins or foreign objects that might be obstructing the connection.

Symptoms of computer not recognizing USB port

USB symbol with a red X over it.

If your computer is not recognizing the USB port, it can be frustrating. Luckily, there are some common symptoms that can help you troubleshoot the issue.

First, check if the USB device is recognized on another computer. If it is, then the problem might be with your computer’s hardware.

Next, try plugging the USB device into a different USB port on your computer. If it works in a different port, then the original port might be faulty.

If your computer is running Windows Vista or a newer version of Microsoft Windows, you can use Device Manager to check if the USB port is disabled or has any issues.

To access Device Manager, right-click on the Start button and select “Device Manager” from the context menu. Look for “Universal Serial Bus controllers” and expand the category. If you see any yellow exclamation marks or red X symbols, there might be a problem with the USB port.

You can try uninstalling the USB driver by right-clicking on the device and selecting “Uninstall device.” Then, restart your computer and Windows will reinstall the driver.

Possible causes of USB port recognition issue

1. Faulty USB hardware: Check if the USB device you’re using is functioning properly by connecting it to another computer. If it works, the issue may lie with your computer’s USB ports.

2. Outdated or incompatible drivers: Ensure that you have the latest drivers installed for your USB ports. Visit the manufacturer’s website or use Windows Update to get the latest updates.

3. Conflicting software: Certain applications or drivers may interfere with USB port recognition. Try disconnecting any unnecessary peripherals and closing any unnecessary applications.

4. Power supply: Insufficient power supply to the USB ports can cause recognition issues. Try connecting the USB device to a different port or using a powered USB hub.

5. Malware or system corruption: Run a full scan of your computer for malware and consider performing a system restore to a previous point when the USB ports were functioning correctly.

Resolving the issue by using Device Manager and restarting the computer

Device Manager window

To resolve USB port recognition issues, you can use Device Manager and restart your computer.

First, open Device Manager by right-clicking on the Start button and selecting “Device Manager” from the context menu.

In Device Manager, expand the “Universal Serial Bus controllers” category. Look for any devices with a yellow exclamation mark or question mark icon. Right-click on those devices and select “Uninstall device” from the context menu. Confirm the uninstallation if prompted.

After uninstalling the devices, restart your computer. Windows will automatically reinstall the USB drivers.

If the issue persists, you can try a workaround by using a USB-to-serial adapter from These adapters enable serial communication with devices that don’t have USB ports.

Updated: April 2024

If your computer is not recognizing your USB port, Fortect may be able to help. It can address issues with damaged system files and faulty settings that may be causing the problem.

Additionally, if the USB port issue is related to missing or corrupt DLL files, Fortect can automatically fix the issue. While it cannot guarantee fixing every USB port problem, it can definitely address certain aspects that may be contributing to the error.

import usb.core

# List connected USB devices
def list_usb_devices():
devices = usb.core.find(find_all=True)
if devices:
for device in devices:
print("No USB devices found.")

# Main function
if __name__ == "__main__":

This code snippet uses the `usb.core.find()` function from the `pyusb` library to find and list all connected USB devices.

Fixing the problem by disabling and re-enabling the USB controller

USB controller being disabled and re-enabled

If you’re experiencing issues with your USB ports not recognizing devices, one potential solution is to disable and re-enable the USB controller. This can help reset the connection and resolve any communication problems.

To do this, follow these steps:

1. Press the Windows key + X on your keyboard and select “Device Manager” from the menu that appears.
2. In Device Manager, expand the “Universal Serial Bus controllers” category.
3. Right-click on the USB controller that is causing the issue and select “Disable device” from the context menu.
4. A warning message may appear, click “Yes” to confirm the action.
5. After disabling the USB controller, right-click on it again and select “Enable device” to re-enable it.
6. Restart your computer to apply the changes.

This should help resolve USB port recognition issues. If the problem persists, you may need to consider other troubleshooting steps or seek assistance from a system administrator or technical support.

Note: The steps provided are based on Microsoft Windows operating systems. If you’re using a different operating system, the process may vary.

Workaround options for USB port recognition problem

  1. Ensure that the USB cable is securely plugged into the port and the device.
  2. If possible, try a different USB cable to rule out any cable-related issues.
  3. Inspect the USB port for any physical damage or debris that may be obstructing the connection.
  4. If you are using a USB hub, disconnect and reconnect it to the computer.

Method 2: Restart the computer

  1. Save all your work and close any open programs.
  2. Click on the “Start” menu, select “Restart” or “Shutdown,” and then choose “Restart.”
  3. Wait for the computer to fully restart and check if the USB port is recognized.

Method 3: Update USB drivers

  1. Open the “Device Manager” by pressing Win+X and selecting “Device Manager” from the menu.
  2. Expand the “Universal Serial Bus controllers” category.
  3. Right-click on the USB port that is not recognized and select “Update driver.”
  4. Choose the option to automatically search for updated driver software. If an update is found, follow the on-screen instructions to install it.

Method 4: Disable USB selective suspend setting

  1. Open the “Power Options” by pressing Win+X and selecting “Power Options” from the menu.
  2. Click on “Change plan settings” next to your selected power plan.
  3. Click on “Change advanced power settings.”
  4. Expand the “USB settings” category and then expand “USB selective suspend setting.”
  5. Change the settings for both “On battery” and “Plugged in” to “Disabled.”
  6. Click “Apply” and then “OK” to save the changes.

Method 5: Uninstall and reinstall USB controllers

  1. Open the “Device Manager” by pressing Win+X and selecting “Device Manager” from the menu.
  2. Expand the “Universal Serial Bus controllers” category.
  3. Right-click on the USB port that is not recognized and select “Uninstall device.”
  4. Confirm the uninstallation and then restart the computer.
  5. Upon restarting, the USB controllers will be automatically reinstalled.

Uninstalling and reconnecting the external hard drive as a resolution

To troubleshoot USB port recognition issues, you can try uninstalling and reconnecting the external hard drive. This can help resolve any connectivity issues between the computer and the USB hardware.

Here’s how to do it:

1. Open the Start menu and search for “Device Manager.”
2. Click on the Device Manager from the search results to open it.
3. Expand the “Universal Serial Bus controllers” category.
4. Locate the external hard drive in the list of devices.
5. Right-click on the external hard drive and select “Uninstall device.”
6. Follow the on-screen instructions to complete the uninstallation process.
7. Once the uninstallation is done, disconnect the external hard drive from the computer.
8. Wait for a few seconds and then reconnect the external hard drive to the computer.
9. Windows will automatically reinstall the necessary drivers for the external hard drive.
10. Check if the USB port recognition issue is resolved.

If the issue persists, you may want to consider checking for updated drivers or contacting the manufacturer for further assistance.

Additional steps such as installing updates, reinstalling USB controllers, and disabling USB selective suspend

  • Installing updates: Ensure that your computer has the latest software updates installed. This can help resolve any compatibility issues or bugs affecting USB port recognition.
  • Reinstalling USB controllers: Sometimes, the drivers for your USB controllers may become corrupted or outdated. Try uninstalling and reinstalling the USB controllers to refresh the connection and improve recognition.
  • Disabling USB selective suspend: USB selective suspend is a power-saving feature that may interfere with proper USB port recognition. Disabling this feature can help ensure consistent USB connectivity.
Example Alert

If your computer fails to recognize the USB port, it is advisable to exercise caution and troubleshoot the issue without jumping to conclusions. Download this tool to run a scan

Was this article helpful?

Similar Posts