Windows⏱️ 2 min read📅 2026-05-29

How to Fix 0x80073b01 Error – 0x80073b01 Windows Defender Application Guard Error

Resolve Windows Defender Application Guard Error Code 0x80073b01 with this step-by-step guide.

Quick Answer: Disable and re-enable Windows Defender Application Guard to fix the error.

The Windows Defender Application Guard error code 0x80073b01 typically occurs when there's a conflict between Windows Defender Application Guard and other security software. To resolve this issue, follow these steps:

⚠️ Common Causes

  • Outdated or corrupted Windows Defender Application Guard software.
  • Conflicting security software or settings.

🛠️ Step-by-Step Fixes

Method 1: Quick Fix

  1. Step 1: Press the Windows key + X and select Device Manager. In the Device Manager, expand the 'Imaginary Devices' section and find the 'Windows Defender Application Guard' device. Right-click on it and select 'Disable device'. Wait for 30 seconds.
  2. Step 2: Enable the Windows Defender Application Guard device again by right-clicking on it and selecting 'Enable device'.

💡 Conclusion

By disabling and re-enabling Windows Defender Application Guard, you should be able to resolve the error code 0x80073b01. If the issue persists, try updating your Windows Defender software or seeking further assistance from Microsoft support.

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