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Windows Defender High CPU and Memory Usage Not Working: Fixes - How to Resolve Windows Update Error 0x80070643-How to Fix Windows Defender DNS Error on Windows 11

Updated 2026-06-13 14:27:05security-tools
Windows Defender High CPU and Memory Usage Not Working: Fixes - How to Resolve Windows Update Error 0x80070643-How to Fix Windows Defender DNS Error on Windows 11
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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