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Windows Defender Not Opening on Windows 11: How to Fix - Windows Update SSL Certificate Error Troubleshooting-Fix Windows Security High CPU Usage and Slow PC

2026-06-13 13:49:33
Windows Defender Not Opening on Windows 11: How to Fix - Windows Update SSL Certificate Error Troubleshooting-Fix Windows Security High CPU Usage and Slow PC

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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