Post-restart telemetry: officePFRO cleared (real restart worked) but install still
fails [Failing PreReq=SXSMSI]/1603 with NO pending reboot - so 1603 is not a reboot
issue here.
- Stop claiming "reboot needed" on every 1603; only when a reboot is actually
pending (Test-OfficeRebootPending = CBS/WU or an Office file-rename).
- Fast-Startup-aware restart hint (use Restart, NOT Shut down) when reboot IS
pending; gate before the ~3 GB download (this is the user-visible restart notice).
- Capture Windows Installer state in diagnostics (msiserver status/starttype,
Installer\InProgress, free disk GB) to pinpoint the SXSMSI prereq failure.
- Defensively re-enable msiserver if Disabled (a common SXSMSI cause).
- Get-OdtLogTail also matches prereq/sxsmsi lines.
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