Reddit Validated Operating System Error Code 0xFFFFF804: How to Fix It

Medium 45 minutes High Severity Verified June 2026
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Error Code
0xFFFFF804
Brand
Reddit Validated
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
45 minutes
Error code 0xFFFFF804 is a Windows stop error (Blue Screen of Death) caused by a kernel access violation in the NDIS (Network Driver Interface Specification) driver region. This usually indicates a network driver bug, corrupted system files, or failing hardware like a network card. This guide will help you diagnose and resolve the issue.
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Tools You'll Need

How to Fix Error Code 0xFFFFF804

  1. Backup Important Data

    Back up data before proceeding with fixes.

  2. Boot into Safe Mode

  3. Run Network Troubleshooter

  4. Update Network Drivers

    Ensure internet connection via another device or use a USB network adapter.

  5. Roll Back Network Drivers

  6. Uninstall and Reinstall Network Drivers

  7. Run System File Checker (SFC)

  8. Run DISM Tool

  9. Check for Windows Updates

    Restart after updates.

  10. Test Network Card Hardware

    Unplug PC before opening case.

Parts You May Need

Network Adapter (Ethernet or Wi-Fi card)
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Network Adapter (Ethernet or Wi-Fi card)
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Network Adapter (Ethernet or Wi-Fi card)
Check Price on Amazon
Network Adapter (Ethernet or Wi-Fi card)
Check Price on Amazon
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When to Call a Professional

If none of the steps resolve the error, the issue may be a failing network adapter or motherboard. A technician can replace the network card or diagnostic hardware. Also, if you encounter blue screens during any step, seek professional help.

Frequently Asked Questions

What causes error 0xFFFFF804?
Error 0xFFFFF804 is caused by a kernel access violation in the NDIS network driver region. Common causes include outdated/corrupt network drivers, system file corruption, Windows update issues, or faulty network hardware.
Can I fix error 0xFFFFF804 without safe mode?
Yes, if you can boot normally, try updating drivers or running SFC. But safe mode is recommended for stability. If you can't boot at all, use Windows Recovery Environment (WinRE) to access troubleshooting options.
Does error 0xFFFFF804 damage my computer?
It is a stop error that prevents crashes but doesn't permanently damage hardware. However, frequent blue screens may indicate failing hardware, so fix it promptly.
What if updating drivers doesn't help?
Try rolling back drivers, uninstalling and reinstalling, or running SFC/DISM. If still failing, perform a system restore to a point before errors started. Last resort: reset Windows.
Can a virus cause error 0xFFFFF804?
Yes, malware can corrupt system files or drivers. Run a full antivirus scan with Windows Defender or a third-party tool to rule this out.

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