Winget-AutoUpdate (WAU) is a PowerShell-based Windows service that automates daily application updates using the winget package manager. It runs as a scheduled task in both system and user contexts, supporting blacklist/whitelist filtering, GPO/Intune management via ADMX templates, and extensible 'Mods' for pre/post-install hooks. The architecture is modular: a main orchestrator (Winget-Upgrade.ps1) loads single-responsibility functions from a `functions/` directory, handles network checks, prerequisite installation, and update logic. Notifications use Windows Toast API with locale support. The MSI installer (built with WiX) creates scheduled tasks and registry configuration. External dependencies include winget CLI, Microsoft Visual C++ Redistributable, and optional AzCopy for Azure Blob mods sync. The codebase demonstrates solid PowerShell engineering with structured logging, semantic versioning, and comprehensive CI/CD pipelines.