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How to Fix Cloudflare 521 Error (Port 443 Blocked) - Resolve Git Index Lock File Error-How to Fix Explorer Restart Loop After Windows Update

2026-07-28 10:38:02
How to Fix Cloudflare 521 Error (Port 443 Blocked) - Resolve Git Index Lock File Error-How to Fix Explorer Restart Loop After Windows Update

Result check

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

Next references

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