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Home / windows-fixes / Fix Windows Defender Login Loop on Windows 10 - Fix Microsoft Store Authentication Fails Due to Proxy-Windows Security Startup Permission Denied Troubleshooting

Fix Windows Defender Login Loop on Windows 10 - Fix Microsoft Store Authentication Fails Due to Proxy-Windows Security Startup Permission Denied Troubleshooting

2026-06-13 14:41:17
Fix Windows Defender Login Loop on Windows 10 - Fix Microsoft Store Authentication Fails Due to Proxy-Windows Security Startup Permission Denied Troubleshooting

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.