The Anniversary Update now enforces a more strong driver signature. Zadig uses libwdi, which generates cross-signed drivers, that kind of signature is refused too in Anniversary Update unless you enable test mode. In other words, try running "bcdedit -set TESTSIGNING ON" with elevated privileges and then try running Zadig again. For the annoying watermark which is shown while in test mode, you can use "Universal Watermark Disabler" from WinAero (Google it) to get rid of it...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)