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Fix Windows Update Service Stuck on Starting - Resolve Windows Update 0x80070005 Access Denied Error-How to Resolve Cloudflare 521 Server Down

Updated 2026-06-13 11:50:00productivity-apps
Fix Windows Update Service Stuck on Starting - Resolve Windows Update 0x80070005 Access Denied Error-How to Resolve Cloudflare 521 Server Down
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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