Microsoft Windows Error Code 0x80070042: How to Fix It

Easy 15-30 minutes Medium Severity Verified June 2026
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Error Code
0x80070042
Brand
Microsoft Windows
Product Type
hresult
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Error code 0x80070042 indicates a 'bad device type' error, meaning Windows has encountered an invalid device type during a system operation. This typically occurs due to driver conflicts, corrupted system files, or hardware incompatibility. Follow these steps to resolve the issue.
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Tools You'll Need

How to Fix Error Code 0x80070042

  1. Restart Your Computer

  2. Run the Hardware Troubleshooter

  3. Check Device Manager for Conflicts

  4. Run System File Checker (SFC)

  5. Perform a Clean Boot

  6. Check for Windows Updates

  7. Use System Restore

    This will uninstall recently installed apps and drivers.
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When to Call a Professional

If none of these steps resolve the error, you may need professional help. Consider contacting Microsoft Support or a certified technician, especially if you suspect hardware failure or require advanced system repairs.

Frequently Asked Questions

What causes error 0x80070042?
This error is usually caused by driver conflicts, corrupted system files, or incompatible hardware. It may also appear after a failed Windows update or driver installation.
Can I ignore error 0x80070042?
No, ignoring it may lead to system instability, crashes, or inability to use certain devices. It's best to troubleshoot as soon as possible.
Will resetting Windows fix error 0x80070042?
Yes, a Windows reset or reinstall can resolve persistent errors, but it should be a last resort. Try the other steps first to avoid data loss.
Does error 0x80070042 indicate hardware failure?
Not necessarily. While it can be caused by hardware issues, it's often a software problem. However, if the error persists after software fixes, hardware diagnostics may be needed.
How do I prevent error 0x80070042 in the future?
Keep Windows and drivers up to date, avoid installing incompatible software, and regularly scan for malware. Use reliable hardware and ensure proper driver installation.

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