Extracts embedded WinDivert binaries to %PROGRAMDATA%\Drover\windivert\
on first run; subsequent runs detect matching SHAs and no-op. SHA
mismatch after write produces an AV-friendly error message pointing
the user at adding the directory to exclusions.
ARM64 detected at runtime via runtime.GOARCH and refused gracefully.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
root
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