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Fix Windows Defender Proxy Error Sync Issue - Fix 'File Locked by Unknown Process' in Command Prompt-How to Fix Teams Access Denied Errors

2026-06-13 20:54:18
Fix Windows Defender Proxy Error Sync Issue - Fix 'File Locked by Unknown Process' in Command Prompt-How to Fix Teams Access Denied Errors

Result check

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