Full Diagnostic Tree & Step-by-Step Overview
Did this audio loss happen immediately after a recent Windows update or driver update?
- Yes, it happened right after an update
- No, it happened randomly / after waking from sleep
Solution: Roll Back Audio Bus Driver
Solution:
Restore Previous Sound Driver
Windows updates frequently override working audio bus controllers with generic broken drivers.
1. Right-click the Start menu and open Device Manager.
2. Expand System devices (not Sound, video and game controllers).
3. Look for Intel Smart Sound Technology OED or High Definition Audio Controller.
4. If there is a yellow exclamation mark next to it, right-click and choose Properties.
5. Go to the Driver tab and click Roll Back Driver (if available).
6. If unavailable, click Update Driver > Browse my computer for drivers > Let me pick from a list, select the older working driver, and click Next.
Open Device Manager (Windows Key + X > Device Manager). Is 'Sound, video and game controllers' visible in the list?
- Yes, it's listed there
- No, the whole category is missing!
Solution: Restart Audio Background Services
Solution:
Restart Windows Audio Stack
1. Press Windows Key + R, type services.msc, and press Enter.
2. Scroll down to Windows Audio.
3. Right-click Windows Audio and choose Restart.
4. Repeat the restart step for Windows Audio Endpoint Builder.
5. Ensure both services have Startup type set to Automatic.
Solution: Rescan Hardware & Reinstall Realtek Audio
Solution:
Force Windows to Redetect Sound Card
1. In Device Manager, click Action at the top menu bar.
2. Click Scan for hardware changes.
3. If your sound card still doesn't appear, click View > Show hidden devices.
4. Under *Sound, video and game controllers*, right-click Realtek High Definition Audio (or generic High Definition Audio) and choose Uninstall device.
5. Restart your PC. Windows will automatically install a fresh working audio driver upon boot.