“Such GDIDs are typically used for diagnostic and crash reporting, feature-usage analysis, and detecting abuse patterns such as one machine repeatedly claiming free trials or licences.”
Every Windows install ships with a permanent Global Device ID. It survives updates. It survives a VPN. There is no off switch, and only a full reinstall clears it. Microsoft handed one to the FBI and they caught an alleged Scattered Spider member. Fine. But the same fingerprint sits on your machine right now, logging your activity with timestamps, waiting for the next court order.