Advanced PC Network Troubleshooter for Stubborn DNS & Connectivity Issues

The user's experience perfectly highlights a significant pain point: persistent and complex network connectivity issues (specifically DNS resolution failures) that defy conventional troubleshooting. The problem started after a GPU change and escalated after a PC move, affecting all network interfaces (wired, wireless, hotspot) on a single PC. The user has already attempted an extensive list of manual fixes, from driver updates and network resets to public DNS and command-line diagnostics, yet remains stuck and considers a dreaded Windows reinstallation due to data loss concerns.

This scenario reveals a niche for a sophisticated SaaS product: an 'Advanced PC Network Health Scanner & Auto-Fixer'. This tool would go beyond basic Windows troubleshooters, offering a deep-dive diagnostic into system-level network components. It would detect, analyze, and, where possible, automatically fix issues such as:

1. Driver Conflicts/Corruption: Identify issues with network adapter drivers or conflicts arising from new hardware installations (like the GPU in this case).
2. Winsock & TCP/IP Stack Corruption: Common culprits that are hard for average users to fix manually.
3. Service Malfunctions: Ensure critical network services (DNS Client, DHCP Client, NLA, etc.) are running correctly.
4. Firewall & Host File Issues: Pinpoint unexpected blocks or redirects.
5. Registry Anomalies: Detect subtle registry corruptions affecting network functionality.
6. Power Management Settings: Identify aggressive power-saving settings that might disable network adapters intermittently.
7. Resource Conflicts: Check for IRQ or other hardware resource conflicts, especially relevant after hardware changes.

The SaaS product would offer a one-click scan, provide clear explanations of detected problems, suggest specific solutions, and offer an 'auto-fix' option with rollback capabilities. Crucially, it would aim to prevent the need for a full OS reinstall, saving users time, data, and immense frustration. A detailed diagnostic report export feature would also be invaluable for users seeking advanced support.

Product Form: A desktop application with a cloud-based backend for knowledge base, updates, and potentially remote diagnostics (with user permission). Subscription-based model.