Welcome manribut,
I understand how frustrating this can be when the Volume Mixer keeps disappearing and reappearing every few seconds.
To help narrow down the cause, could you please let us know:
- Are you using Windows 10 or Windows 11?
- Does the audio itself stop when the Volume Mixer disappears, or is it only the Volume Mixer window that closes and reopens?
- Does this happen all the time, or only when a specific headset, speaker, or USB audio device is connected?
In the meantime, please try these quick checks:
- Press Windows + X and select Device Manager
- Expand Sound, video and game controllers
- Right-click your audio device and select Properties, then check whether the device status shows any errors.
- Also open Settings > System > Sound and tell me which audio device is selected as the output device.
I look forward to your update.