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Fix 'Windows Cannot Access Shared Folder' in Workgroup - Fix Cloudflare Error 521 After a Server Update-Troubleshoot Windows Update Error 0x80070005

Updated 2026-07-28 10:00:09developer-tools
Fix 'Windows Cannot Access Shared Folder' in Workgroup - Fix Cloudflare Error 521 After a Server Update-Troubleshoot Windows Update Error 0x80070005
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.