Tier 4 honest escalation

Honest detect-and-guide for the KB5072911 shell corruption DISM cannot repair, plus installer verification.

• Tier 4 honest escalation: when DISM, SFC, and CBS reset cannot fix KB5072911 shell corruption, SimpleFixAI detects the System32 framework binary signature and guides you to Microsoft's documented in-place upgrade with a mandatory backup acknowledgment before any reinstall steps are shown
• This is detection and guidance, not an automated cure. SimpleFixAI cannot repair System32 framework binary corruption. The in-place upgrade is Microsoft's remedy and we route you to it honestly
• KB5089573 awareness: Microsoft released the permanent fix for the KB5089549 install failure on May 26. SimpleFixAI now detects it and suppresses the install-failure guidance when your PC already has the fix
• CBS.log signature parsing: three Microsoft-documented deterministic strings make the ESP install-failure detection precise rather than heuristic
• Secure Boot 2023 certificate detection: Microsoft's original 2011 certificates begin expiring June 2026. A new guidance card surfaces when your PC has not received the 2023 certificate update. Detection only, because Microsoft handles the update via Windows Update
• Installer verification: published SHA-256 checksums and a verification page at get.simplefixai.com/verify so you can confirm your download matches what we published
• Image upload in feedback form: attach up to three screenshots when reporting issues
• Old-hardware scan support: 180-second scan budget with per-collector timeouts, so scans finish on slow machines instead of hanging
• End-of-life Windows detection with Microsoft lifecycle dates