No sound is one of those problems where the cause could be a muted slider or a dead driver, and there’s no way to tell them apart by looking. So instead of a random list, this guide runs in order — thirty-second checks first, then settings, then drivers, then the deeper stuff.
Work top to bottom and stop when the sound comes back.
Before anything else: three checks that take a minute
1. Is it Windows, or is it that one app?
Open YouTube in a browser and play anything. If YouTube has sound but your game or Discord doesn’t, Windows is fine: the app is sending audio to the wrong device. Skip to per-app output.
2. Is the right device selected?
Click the speaker icon in your taskbar. There’s a small arrow or device name above the volume slider — click it and pick your actual speakers or headphones. Windows loves switching output to an HDMI monitor with no speakers after a restart or a display change.
3. Is something muted?
Right-click the speaker icon → Open Volume Mixer. Check that the master slider and your app’s slider are both up, and neither has a crossed-out speaker icon next to it.
If your keyboard has a mute key, tap it. Some laptops mute at hardware level and Windows never shows it.
Fix 1: Run the audio troubleshooter
This one is worth doing early because it fixes a specific, common failure, the Windows Audio service stopping, automatically.
- Right-click the speaker icon in the taskbar
- Click Troubleshoot sound problems
On Windows 11 you can also go to Settings → System → Troubleshoot → Other troubleshooters → Audio → Run.
Let it finish and apply whatever it suggests. If it says “Audio service not responding,” that’s your answer, see Fix 6.
Fix 2: Check the output device properly
The taskbar picker only shows enabled devices. If Windows has disabled your speakers, they won’t appear there at all.
- Settings → System → Sound
- Scroll to the bottom and click More sound settings
- In the Playback tab, right-click in the empty white space
- Tick Show Disabled Devices and Show Disconnected Devices
Grayed-out devices will now appear. Find your speakers or headphones, right-click → Enable, then right-click again → Set as Default Device.
While you’re here: right-click your device → Properties → Levels tab, and make sure the slider isn’t at zero and the speaker icon isn’t muted. This is a second, separate mute from the taskbar one, and plenty of people never find it.
Fix 3: Test the hardware
Two minutes here saves an hour of chasing software problems.
- Plug headphones into the green 3.5mm jack on the back of a desktop (front-panel jacks fail often). If headphones work and speakers don’t, it’s the speakers.
- On a laptop, plug in any headphones. Sound in headphones but not speakers usually means a stuck headphone-jack switch, plug and unplug a few times.
- Try a different USB port for USB headsets, and avoid hubs.
- If you use HDMI or DisplayPort to a monitor with speakers, check the monitor’s own volume in its on-screen menu.
Fix 4: Check per-app volume and output
Windows lets every app have its own volume and its own output device, and it remembers those settings even after you change your main device.
- Settings → System → Sound
- Scroll to Advanced → Volume mixer
- Expand each app
Set the app’s Output device to Default and push its volume up. Games and voice apps are the usual offenders — Discord in particular keeps its own device list in its own settings (User Settings → Voice & Video).
Fix 5: Reinstall the audio driver
If sound broke after a Windows update, this is almost always the cause.
- Press
Win + X→ Device Manager - Expand Sound, video and game controllers
- Right-click your audio device (usually Realtek Audio, High Definition Audio Device, or an Intel entry)
- Click Uninstall device
- If you see a box saying Delete the driver software for this device, tick it
- Restart
Windows reinstalls a working driver on boot. If sound is still dead, go to your PC or motherboard manufacturer’s support page, find your exact model, and install their audio driver directly. The generic Microsoft driver works for basic output but breaks features on many laptops.
If the update itself broke it: right-click the device → Properties → Driver tab → Roll Back Driver. This only works if Windows kept the old version, so it’s worth trying before the uninstall above.
A trick for stubborn cases: right-click the device → Update driver → Browse my computer → Let me pick from a list. Choose High Definition Audio Device instead of the manufacturer driver. It’s more basic, but it works when a vendor driver won’t.
Fix 6: Restart the Windows Audio services
Audio depends on two services. If either stops, everything goes silent even though all your settings look correct.
- Press
Win + R, typeservices.msc, press Enter - Find Windows Audio
- Right-click → Restart (or Start if it’s stopped)
- Double-click it and set Startup type to Automatic
- Do exactly the same for Windows Audio Endpoint Builder
- Also check RPC Endpoint Mapper and Remote Procedure Call (RPC) are running — audio depends on them
If the services keep stopping on their own, that usually points at a corrupted driver, go back to Fix 5.
Fix 7: Deal with Windows Audio Device Graph Isolation
If your sound works but your CPU is pegged, or audio stutters and crackles, audiodg.exe — shown in Task Manager as Windows Audio Device Graph Isolation, is usually the reason.
It isn’t a virus. It’s the Windows process that handles audio effects, kept separate from the main audio service so a bad effect can’t crash your sound. When it eats CPU, the effects are the problem, not the process.
Turn the effects off:
- Settings → System → Sound → More sound settings
- Playback tab → right-click your device → Properties
- Go to the Enhancements or Advanced tab (the name varies by driver)
- Tick Disable all enhancements, or untick Enable audio enhancements
- Apply
On Windows 11 there’s also a per-device toggle: Settings → System → Sound, click your output device, and set Audio enhancements to Off.
Also worth checking: in the Advanced tab, drop the Default Format to 16 bit, 44100 Hz (CD Quality). High sample rates make audiodg work much harder, and you won’t hear the difference on normal speakers.
Never end the audiodg.exe task or delete the file. Windows restarts it immediately, and killing it just silences your PC until you reboot.
Fix 8: Turn off exclusive mode
If sound cuts out whenever a specific app opens, one program is taking exclusive control of your sound card.
- More sound settings → Playback tab → right-click device → Properties
- Advanced tab
- Untick Allow applications to take exclusive control of this device
- Apply
Audio production software, some games, and voice-chat apps do this by design.
Fix 9: Run SFC and DISM
If your sound broke alongside other odd Windows behaviour, system files may be damaged. Open Terminal or Command Prompt as administrator and run these in order:
DISM /Online /Cleanup-Image /RestoreHealthsfc /scannowDISM repairs the store that SFC pulls replacement files from, which is why SFC on its own often reports errors it “could not fix.” Restart when both are done.
Fix 10: Roll back the Windows update
If everything above failed and the timing lines up with an update:
- Settings → Windows Update → Update history
- Scroll down and click Uninstall updates
- Remove the most recent quality update
- Restart
For a feature update (like 23H2 → 24H2), go to Settings → System → Recovery and use Go back — this option only exists for 10 days after the upgrade.
Quick reference
| What you’re seeing | Start here |
|---|---|
| No sound anywhere, red X on speaker icon | Fix 2 — enable the device |
| Sound in browser, silent in one app | Fix 4 — per-app output |
| Broke right after a Windows update | Fix 5 — roll back the driver |
| Speaker icon shows “No audio output device installed” | Fix 5 — uninstall and reinstall driver |
| Crackling, stuttering, or high CPU | Fix 7 — disable enhancements |
| Sound dies when one specific app opens | Fix 8 — exclusive mode |
| Works with headphones, not speakers | Fix 3 — hardware |
| Nothing works, other things also broken | Fix 9 — DISM and SFC |
Common questions
Why does my sound work but the speaker icon shows a red X? The default device has been disabled or disconnected. Enable disabled devices in More sound settings (Fix 2) and set the right one as default.
Is Windows Audio Device Graph Isolation a virus? No. It’s a legitimate Windows process (audiodg.exe) that runs audio effects in a sandbox. If it’s using a lot of CPU, disable audio enhancements, don’t try to remove the process. The real file lives in C:\Windows\System32; anything running from another folder with that name is not legitimate.
My HDMI monitor has no speakers but Windows keeps switching to it. Open More sound settings, right-click the HDMI output, and choose Disable. Windows can no longer switch to it, and your real speakers stay default.
Sound disappears every time I restart. That’s usually the Windows Audio service failing to start automatically. Set both Windows Audio and Windows Audio Endpoint Builder to Automatic in services.msc (Fix 6). If it keeps happening, reinstall the audio driver from your manufacturer rather than letting Windows pick one.
Bluetooth headphones connect but no sound comes out. Bluetooth headsets register as two devices: one for stereo playback and one for calls. In More sound settings, make sure the Stereo version is set as default, not the Hands-Free one. Hands-Free also sounds noticeably worse.
If sound still won’t come back after all of this, plug in any cheap USB headset. USB audio bypasses your motherboard’s sound chip entirely, if that works, the onboard audio hardware has failed, and a $10 USB adapter is a permanent fix.
