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Fix Windows Defender Blocked by Third-Party Antivirus - Windows Explorer Keeps Restarting? Run SFC Scannow-How to Fix Cloudflare 521 Error by Checking Server Logs

2026-07-28 10:51:38
Fix Windows Defender Blocked by Third-Party Antivirus - Windows Explorer Keeps Restarting? Run SFC Scannow-How to Fix Cloudflare 521 Error by Checking Server Logs

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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