⚠️ 3 verified solutions available for Error 20 — Last updated 2026-04-07
Error 20 📋

How to Fix ERROR_BAD_UNIT (Error 20)

Error 20, or ERROR_BAD_UNIT, occurs when the system is unable to locate a specified device. This error can be triggered by various system actions, such as trying to access a non-existent disk drive or attempting to use a device that has been removed. It's essential to resolve this issue to maintain system stability and prevent further errors.

🏷️ Code: 20 📛 ERROR_BAD_UNIT 📅 Updated: 2026-04-07 ⏱️ 3 Solutions
🐞 Auto-Fix Script for Error 20

💡 What is Error 20?

To resolve the ERROR_BAD_UNIT error, users can try a variety of solutions, ranging from simple troubleshooting steps to more advanced fixes. For instance, checking the device configuration and ensuring that all devices are properly connected can often resolve the issue. In other cases, updating drivers or reinstalling device software may be necessary. In more severe cases, users may need to perform a system restore or reinstall the operating system to resolve the issue. It's essential to approach the troubleshooting process in a methodical and systematic way, as this can help identify the root cause of the error and prevent it from occurring in the future.

⚠️ Common Causes

  • Incorrect device configuration
  • Driver issues or corruption
  • Hardware problems or device removal

Step-by-Step Solutions

1 Check Device Configuration
  1. Verify that the device is properly connected
  2. Check the device settings in the Device Manager
  3. Ensure that the device drivers are up to date
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Show Advanced Solutions (2 more)
2 Update Device Drivers
  1. Open the Device Manager
  2. Locate the device with the error
  3. Update the device driver
3 Perform System Restore
  1. Open the Control Panel
  2. Select Recovery
  3. Choose a restore point prior to the error

🎬 Video Tutorials

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🛡️ Prevention Tips

  • Regularly update device drivers
  • Scan for malware and viruses
  • Verify device connections before use
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Last updated: 2026-04-07
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-04-07.
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