Fix Windows Defender High Memory Usage & Error 0x80070002 - Windows Activation Key Not Accepted – How to Fix-Troubleshoot 0x80070005 by Resetting Windows Update

Updated 2026-06-13 16:00:17security-tools
Fix Windows Defender High Memory Usage & Error 0x80070002 - Windows Activation Key Not Accepted – How to Fix-Troubleshoot 0x80070005 by Resetting Windows Update
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.