> This situation has.. no precedent as far as I can tell..

No, this has been going on for years. Vendors have been pushing malicious software through the Windows Update automatic driver installation since forever. MSI and Nahimic/A-Volute (this has watchdog daemon to instantly reinstall it as well as the main app protecting the daemon), the ASUS Armory Crate bullshit, the Lenovo garbage, which initially they only put into their own images, but then started force-installing via Windows Update, Gigabyte, ... the list is really long.

If you have to use Windows, you really absolutely should disable driver installation through Windows Update.