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Solutions to Resolve Windows Defender Error Code 0x80073b01

2023/12/18
PC Repair

Key Notes

  • Removing conflicting third-party security software is vital for resolving this issue.
  • Registry modifications can resolve persistent issues but proceed with caution.
  • Running an SFC scan can fix corrupted system files affecting Windows Defender.

Resolving Windows Defender Error Code 0x80073b01: A Step-by-Step Guide

Encountering error code 0x80073b01 while using Windows Defender can limit your security options and pose a significant risk to your system. This guide provides detailed solutions to restore full functionality to Microsoft Defender security features.

Methods to Resolve Windows Defender Error 0x80073b01

Step 1: Uninstall Third-Party Security Software

Conflicting antivirus programs can disrupt Windows Defender’s operations. Follow these steps to remove unnecessary security applications:

  • Press Windows + I to open Settings.
  • Select Apps > Apps & Features.
  • Search for your third-party antivirus in the list.
  • Click it and select the Uninstall button.
  • Confirm by clicking Uninstall in the dialog that appears.

Pro Tip: After uninstalling, restart your computer and check if the issue persists.

Step 2: Adjust Registry Settings

Editing the Registry can resolve configuration issues, but it’s crucial to proceed carefully:

  • Click Start, type regedit, and hit Enter.
  • Allow UAC prompts by clicking Yes.
  • Navigate to:

    • HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows NT/Current Version/Image File Execution Options HKEY_CURRENT_USER/Software/Microsoft/Windows/Current Version/Policies/Explorer/DisallowRun

  • Delete the msseces.exe entry from both locations.
  • Restart your device.

Pro Tip: Always back up the registry before making changes to avoid potential system issues.

Step 3: Re-register Windows Defender DLL Files

Re-registering DLL files can restore proper functionality to Windows Defender. To do this:

  • Press Windows + X and select Command Prompt (Admin).
  • Allow any prompts from UAC.
  • Enter the following commands, pressing Enter after each:

regsvr32 wuaueng.dll regsvr32 wucltui.dll regsvr32 softpub.dll regsvr32 wintrust.dll regsvr32 initpki.dll regsvr32 wups.dll regsvr32 wuweb.dll regsvr32 atl.dll regsvr32 mssip32.dll

After registering these files, restart your computer and check if the issue is resolved.

Step 4: Execute an SFC Scan

To fix potential corruption in system files, using the System File Checker can be beneficial:

  • Open Command Prompt as Administrator.
  • Type the following command:

sfc /scannow

  • Hit Enter to initiate the scan.

Wait for the scan to complete, then restart your PC to apply any repairs found.

Step 5: Activate Windows Defender Services

If Windows Defender services are not running, this can lead to error 0x80073b01:

  • Press Windows + R to open Run.
  • Type services.msc and hit Enter.
  • Locate Windows Defender Antivirus Service and double-click it.

In the properties window, set Startup type to Manual and click Start.

Then check and adjust the following services:

  1. Windows Defender Firewall – Automatic
  2. Windows Defender Advanced Threat Protection – Manual
  3. Microsoft Defender Antivirus Network Inspection Service – Manual

Pro Tip: Keep your Windows updated to avoid issues with Windows Defender.

Additional Tips

  • Ensure your Windows is updated regularly.
  • Consider using built-in Windows tools to troubleshoot security issues.
  • Regularly check for new updates to Microsoft Defender.

Summary

The error code 0x80073b01 in Windows Defender can be resolved through a series of steps. By uninstalling conflicting applications, modifying registry settings, re-registering DLL files, performing an SFC scan, and ensuring services are active, users can restore their system’s security software functionality.

Conclusion

Troubleshooting Windows Defender error code 0x80073b01 might seem complicated, but following these steps can lead to a successful resolution. Ensure to regularly maintain your system to prevent such errors in the future, keeping your security defenses robust and effective.

FAQ (Frequently Asked Questions)

What causes Windows Defender error 0x80073b01?

This error typically arises due to conflicts with third-party security software, registry issues, or corruption within system files.

Can I resolve this error without expert help?

Yes, the steps outlined in this guide can be performed by most users with basic computer knowledge, but ensure to back up your data before proceeding with registry edits.

PC Repair