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Fix Ubuntu Permission Denied Error in Windows Security Context - PuTTY Connection Refused After Reboot Fix-How to Fix Windows Defender Service Authentication Failed

2026-06-13 16:03:10
Fix Ubuntu Permission Denied Error in Windows Security Context - PuTTY Connection Refused After Reboot Fix-How to Fix Windows Defender Service Authentication Failed

Result check

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