⚠️ 3 verified solutions available for Error 66 — Last updated 2026-04-01
Error 66 📋

How to Fix ERROR_BAD_DEV_TYPE (Error 66)

Error 66, or ERROR_BAD_DEV_TYPE, occurs when the network resource type is not correct, preventing access to shared resources. This error typically appears when trying to connect to a network drive or shared folder. It's a relatively common issue that can be resolved with a few troubleshooting steps.

🏷️ Code: 66 📛 ERROR_BAD_DEV_TYPE 📅 Updated: 2026-04-01 ⏱️ 3 Solutions
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📑 Table of Contents
What is Error 66? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 66?

In terms of troubleshooting, the ERROR_BAD_DEV_TYPE error can be challenging to resolve, as it can be caused by a variety of factors. However, by following a systematic approach, users can identify and address the underlying cause of the error. This may involve checking network configuration settings, updating drivers, and running system diagnostics. In some cases, more advanced troubleshooting may be required, such as analyzing system logs or using specialized tools to diagnose the issue.

⚠️ Common Causes

  • Incorrect network configuration settings
  • Outdated or corrupted network drivers
  • Corrupted system files or registry entries
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✅ Step-by-Step Solutions

1 Check Network Configuration
  1. Open the Network and Sharing Center
  2. Click on Change adapter settings
  3. Verify that the network connection is configured correctly
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2 Update Network Drivers
  1. Open the Device Manager
  2. Expand the Network Adapters section
  3. Right-click on the network adapter and select Update driver
3 Run System Diagnostics
  1. Open the Command Prompt as an administrator
  2. Run the command 'sfc /scannow'
  3. Run the command 'chkdsk /f /r'

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🛡️ Prevention Tips

  • Regularly update network drivers and operating system
  • Use a reliable antivirus program to protect against malware
  • Avoid making unnecessary changes to network configuration settings
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Last updated: 2026-04-01
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-04-01.
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