[p1peridine]

It's not easy but it is possible. You'd have to disable Windows update, IE and Edge, SMB, MRT, Defender, AutoLoggers, WMP DRM, GWX, SmartScreen, WER and change a bunch of registry keys. Disable certain services and scheduled tasks.

DiagTrack and all of it's sub-components have to be completely disabled and replaced with decoy files.

To verify, you'd have to monitor certain APIs via WinDbg and trace certain EventProviders using Windows Performance Recorder over a period of 24 hours to make sure there are no escalation issues (DiagTrack).

Pro-tip: if the EventLog (view them using Event Viewer) is not full of errors that constantly reappear you haven't disabled Telemetry properly.