The short answer
A driver is a plausible cause when an identified audio device reports an error or a specific package change coincides with a reproducible failure. A muted app or disconnected cable points elsewhere. Compare outputs and apps before drawing the conclusion.
Record the pattern
On Windows 11, write down what fails: one application, one endpoint, all outputs, recording only, or sound after sleep. Note when it began and any actual update. Gather a known-working local sound and a comparison output if possible. Do not assume that 'no sound' identifies the affected component.
Three patterns with different next steps
A game is silent while system sounds and a local music file play through the same headphones. That pattern does not justify reinstalling the audio controller. Inspect the game's own output and Windows per-app volume first. If the game uses an audio device that is no longer connected, select a present endpoint.
A speaker crackles only when its cable is moved, and another speaker plays cleanly through the same Windows output. The cable or speaker connection merits attention before a package update. Conversely, multiple outputs disappearing together immediately after a known controller update supplies a stronger reason to examine its driver status and rollback availability.
A Bluetooth headset connects to the PC but cannot play a clip, while built-in speakers still work. Test the headset's route, charge and connection, then examine Bluetooth support if discovery also fails. The internal codec's version is not the natural first suspect. Keep the observations separate so that a later successful test identifies which layer changed.
Isolate one variable at a time
Sound settings show route and volume; a cable check tests the physical link; Device Manager reports device enumeration and some errors. None of these alone proves audible output. A working USB headset with silent laptop speakers is different evidence from all devices disappearing after a driver update.
- Test the original app and a second app using the same selected output.
- Check Windows and app volume, then inspect the cable, device power or Bluetooth connection.
- Test a second output, keeping the same local audio file and safe volume.
- Inspect the matching controller's Device Manager status and update history only if the fault remains.
Caution: Avoid reinstalling several packages at once; it destroys the ability to attribute a result to one change.
Let the observation choose the next action
One app failing suggests its audio settings. One speaker failing across multiple known-good sources suggests that speaker, cable or port. An error on the correctly identified controller after a targeted change makes supported rollback or a matched package reasonable.
If Windows reports a healthy device but physical sound remains absent, that status does not rule out a hardware fault. If a repeated hardware test fails, use the device maker's diagnostics or support rather than attempting unrelated driver versions.