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Error 0x80242006

How to Fix Windows Update Error 0x80242006

Fix time: 10 mins Difficulty: Easy 0 views Updated: July 2026

Troubleshooting guide for error 0x80242006 occurring during Windows Defender or System updates.

Symptoms

  • Windows Defender fails definitions updates with code 0x80242006

Common Causes

  • Corrupt update agent or firewall blocks

Step-by-Step Solutions

Method 1: Reset Windows Defender Update Agent

  1. Open Command Prompt as Administrator.
  2. Run: 
    cd %ProgramFiles%\Windows Defender
MpCmdRun.exe -SignatureUpdate

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