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How to Fix Windows Security Error 'Access Denied' on Startup - How to Fix High CPU Usage by Windows Defender in Windows 11-Fix Windows Update Error 0x80070020: Port Already Allocated

2026-06-13 16:21:39
How to Fix Windows Security Error 'Access Denied' on Startup - How to Fix High CPU Usage by Windows Defender in Windows 11-Fix Windows Update Error 0x80070020: Port Already Allocated

Result check

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

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