On a RM-Laptop2020 I am missing Realtek Audio as a whole

To resolve the problem, you need to go to the support page for your device on the manufacturers website to download and manually install the version of Realtek HD audio drivers they provide, that will be the most compatible version of the audio drivers.

If you have any difficulty locating that support page, click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Information window.

Realtek Audio can be restored by reinstalling or letting Windows use a generic audio driver.

Follow these steps on Windows 10:

1. Open Device Manager
   • Select Start, type Device Manager, and select it.
2. Show hidden and missing audio devices
   • In Device Manager, select View > Show hidden devices.
   • Expand Sound, video and game controllers and check if any greyed‑out Realtek or other audio devices appear.
3. Uninstall any broken/ghost audio device
   • For any problematic Realtek or unknown audio device under Sound, video and game controllers, right‑click it and select Uninstall device.
   • If offered, check Delete the driver software for this device, then select Uninstall.
4. Restart the PC to force driver reinstall
   • Restart the PC. Windows will attempt to reinstall an audio driver automatically.
   • After restart, check Device Manager again under Sound, video and game controllers for a newly installed audio device (Realtek or High Definition Audio Device).
5. If no audio device appears, install a generic Windows audio driver
   • In Device Manager, expand Sound, video and game controllers.
   • Right‑click the audio device (for example, High Definition Audio Device if it appears), select Update driver.
   • Choose Browse my computer for drivers > Let me pick from a list of device drivers on my computer.
   • Select the audio device driver shown, select Next, and follow the instructions to install it.
6. If Windows still shows only “Microsoft Streaming Service Proxy”
   • Use Windows Update and the laptop manufacturer’s support site:
     • Run Windows Update and install all updates, including optional driver updates.
     • Visit the RM‑Laptop2020 manufacturer’s support page, locate the exact model, download the latest audio/Realtek driver for Windows 10, install it, and restart.
7. If audio issues started after a Windows update
   • If Realtek reappears but sound is still broken after an update, roll back the audio driver:
     • In Device Manager, under Sound, video and game controllers, right‑click the audio device > Properties.
     • Go to the Driver tab and select Roll Back Driver, then follow the instructions.

If none of the above restores a working audio device, use the full audio troubleshooter steps in “Fix sound or audio problems in Windows” and, if needed, restore from a system restore point created before the problem started.

References:

• Fix sound or audio problems in Windows
• Update Audio drivers in Windows
• Audio issues after win11 25h2 update - Microsoft Q&A
• No audio with Windows 11 - Microsoft Q&A
• cannot increase volume even if trouble shooter updates it - Microsoft Q&A
• How to get Win 11 to permanently recognise a sound output source (or not recognise one permanently) - Microsoft Q&A
• How to fix this. no audio device is installed - Microsoft Q&A