Windows & BSOD · high

How to fix0x80070422

Windows Defender service disabled

What this error means

Windows Defender service disabled (0x80070422) is a high-severity fault affecting the Windows operating system. The Windows Defender service cannot start, leaving the system vulnerable. It's also often linked to third-party antivirus interference. Work through the steps below in order.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 2 complete
01Uninstall conflicting AV

Uninstall conflicting AV.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Run malware scan in Safe Mode

Run malware scan in Safe Mode.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Third-party antivirus interference
  • Malware disabled the service