Hi Long,
Try these below steps:
- Open Services (services.msc) and restart Windows Audio and Windows Audio Endpoint Builder. Microsoft says restarting those services can recover temporary audio/service failures.
- Run the built-in Audio troubleshooter from Get Help. Microsoft says Windows 11 should start with that automated troubleshooter for sound problems. Link: https://support.microsoft.com/en-us/windows/fix-sound-or-audio-problems-in-windows-73025246-b61c-40fb-671a-2535c7cd56c8?
- Test with a new administrator account. Microsoft says creating a new user account is the fix when a user profile is corrupted.
- If it still fails, do an in-place repair install from Windows installation media and choose Keep personal files and apps. Microsoft says this reinstalls Windows without affecting personal files, settings, or installed applications.
Can you tell me whether Win + A works and whether the icon failure happens in all accounts or just one, I’ll narrow it to the most likely cause.