

Good starting point would be looking up forum or blog posts from people who have disconnected the modem/TCU on a particular EV model. No self-interested auto manufacturer (all of them) would intentionally provide an option in the user interface to take the telemetry system offline. Take note of any side-effects they report, if it needs to be reconnected for inspections, and if there’s any gotchas between software and hardware revisions.



Rollback is only possible after an upgrade from 10 to 11 but before the Windows.old directory (a snapshot of system files and configurations immediately before the upgrade) is purged. After that, a fresh install is the only option. No tool can claim to reliably downgrade Windows since 10 would not know how to handle newly-introduced configurations and data from 11, especially in the registry.