Hardware⏱️ 3 min read📅 2026-06-11

How to Fix: How to fix the "Unknown USB device needs more power than the Port can Supply" error?

Error message indicates a power issue with an unknown USB device.

Quick Answer: Try using a different USB port or upgrading the port to one that can supply more power.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🚀 How to Resolve This Issue
  3. 🎯 Final Words

The 'Unknown USB device needs more power than the Port can Supply' error is a common issue that affects many computer users. This error occurs when a USB device requires more power than the available port on your system can provide, resulting in an incompatible connection.

This error can be frustrating, especially if you have an essential device like a printer or external hard drive that needs to function properly. In this guide, we'll walk you through the steps to troubleshoot and fix this issue.

🛑 Root Causes of the Error

  • The primary reason for this error is when a USB device exceeds the maximum power consumption limit of the port it's connected to. This can happen due to various reasons such as using a high-power device, wearing out the port, or having an incompatible driver.
  • An alternative cause could be if the USB port is damaged or worn out, which might not be able to supply enough power to the device.

🚀 How to Resolve This Issue

Updating Device Drivers

  1. Step 1: Step 1: Open the Device Manager on your computer. To do this, press the Windows key + X and select Device Manager.
  2. Step 2: Step 2: Expand the 'USB Controllers' section and look for the device that's causing the error. Right-click on it and select 'Update driver'.
  3. Step 3: Step 3: Click on 'Search automatically for updated driver software' to let Windows search for any available updates.

Using a USB Hub or Power Adapter

  1. Step 1: Step 1: Connect the device that's causing the error to a USB hub or power adapter. This will provide an additional power source for the device.
  2. Step 2: Step 2: Ensure that the USB hub or power adapter is compatible with your system and the device you're trying to connect.

🎯 Final Words

By following these steps, you should be able to resolve the 'Unknown USB device needs more power than the Port can Supply' error. If the issue persists, it may be worth considering replacing the faulty port or seeking further assistance from a professional technician.

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