Do let Windows Update find the driver automatically. It often pulls an obsolete 2019 driver.
If you have attempted an installation and failed, or if you are upgrading from an older build, you must clean the slate. Conflicting driver remnants are the number one cause of audio glitches. sound blaster z windows 11
Disable "USB Selective Suspend" in Power Options and prevent Windows from turning off the PCIe device (Device Manager → Sound Blaster Z → Properties → Power Management → Uncheck "Allow computer to turn off this device"). Do let Windows Update find the driver automatically