Editing the INF de-authenticates the installation of the driver, which can also be bypassed by adding to the Trusted Publisher root store, which is mutable (as

Editing the INF de-authenticates the installation of the driver, which can also be bypassed by adding to the Trusted Publisher root store, which is mutable (as Zadig/libwdi does), but the actual kernel-mode .sys binary still needs to be signed by Authenticode unless the system is in driver Developer Mode. Your method worked for installing a modified INF file, but will not work for installing a modified binary.