Scott Hanselman, deputy technical director at Microsoft, explained that a service within the Windows diagnostic system collects local performance data to help users identify PC slowdowns. This data remains on the user's device unless the user opts to share it with Microsoft. Hanselman acknowledged that the service's description is unclear and that Microsoft plans to revise it based on user feedback. Concerns about data collection have been raised by Windows users, particularly regarding services like Recall, which faced backlash despite its local data storage promise. Microsoft is reconsidering its data collection approach in light of these concerns.