When audio suddenly goes silent on a Windows PC, the cause could be any of several things: a muted system, zero volume, a misconfigured output device, a broken sound driver, or a stopped Windows Audio service. Randomly poking at settings rarely gets you anywhere fast. The better approach is to narrow down the symptom first, then follow the matching fix. This guide covers Windows 11 (through 24H2) and Windows 10, and addresses every common scenario — total silence, one app with no sound, HDMI or Bluetooth output that won't work, and more.
Table of Contents
- Diagnosing the symptom: narrow down the cause
- Check volume and mute settings
- Check and switch the default output device
- Check and update your sound driver
- Run the Windows audio troubleshooter
- Restart the Windows Audio service
- Sound missing in one specific app
- No sound over HDMI or Bluetooth
- Rule out a hardware problem
- Known issues after a Windows update
- Frequently asked questions
- Summary: step-by-step checklist
Diagnosing the symptom: narrow down the cause
The six categories of no-sound problems
Before touching any settings, identify which category your problem falls into. Doing so eliminates a lot of unnecessary steps.
- Mute or zero volume — The system or an individual app is muted, or the volume slider is at zero
- Wrong output device — Windows is sending audio to a device you're not listening to
- Corrupted or outdated driver — The sound driver is broken, missing, or out of date
- Windows Audio service stopped — The background service that handles audio processing has stopped or been disabled
- App-level issue — One app has its own mute, wrong output device, or exclusive mode enabled
- Hardware failure — A physical problem with the speaker, headphone, sound card, or audio port
In the vast majority of cases, mute settings, the output device, or the driver is the culprit. Work through them in order and you'll usually land on a fix quickly.
Symptom-to-cause quick reference
| Symptom | Most likely cause | Start here |
|---|---|---|
| No sound at all from the PC | Mute / output device / driver / audio service stopped | Taskbar speaker icon → output device → driver |
| Only one app has no sound | Volume Mixer / in-app settings / exclusive mode | Volume Mixer → app audio settings |
| Silent only when headphones are plugged in | Output device not switched / bad port / driver | Settings → Sound, check the output device |
| No sound from an HDMI-connected monitor or TV | HDMI device not set as default | Settings → Sound, select the HDMI device |
| No sound from a Bluetooth device | Wrong profile / not set as default / pairing issue | Set the Bluetooth device as the default output |
| Silence started after a Windows update | Driver overwritten / settings reset by update | Device Manager, check for a driver error flag |
Check volume and mute settings
Check the taskbar speaker icon
The most commonly overlooked cause is a muted system. Look at the speaker icon in the notification area (bottom-right corner of the taskbar). If you see an X or a slash through it, the system is muted.
- Right-click the speaker icon and choose Open Volume Mixer (Windows 11), or left-click it to reveal the volume slider (Windows 10)
- Make sure the slider isn't at zero and the mute button (the speaker icon next to the slider) isn't active
- Click the speaker icon to unmute, and raise the volume to 50 or above to test
On Windows 11, the Quick Settings panel — click the Wi-Fi / battery cluster at the right end of the taskbar — also has a volume slider you can adjust from there.
Check the physical mute key on your keyboard
Laptops and keyboards with media keys usually include a hardware mute button. If the key has a speaker-with-X icon, check whether you accidentally pressed it. A hardware mute overrides all Windows settings — changing the volume in Windows has no effect while it's active.
On models where mute is a secondary function, try pressing Fn + the mute key once to toggle it off, then test your audio again.
Check the per-app Volume Mixer
Windows lets you set a separate volume for each application. If only one app is silent, the Volume Mixer is the first place to look.
- Right-click the speaker icon and choose Open Volume Mixer
- Confirm that the problem app appears in the list. (If it doesn't, the app may not currently be outputting audio.)
- If the app's slider is at zero or the mute icon is active, fix it
On Windows 11, you can reach the same screen through Settings → System → Sound → Volume Mixer, where you can also reassign the output device for each app individually.
Check and switch the default output device
Select the default device in Settings → Sound
Even if the volume is fine, you won't hear anything if Windows is sending audio to the wrong device. This happens most often after plugging in or unplugging headphones, or connecting a Bluetooth device.
Windows 11:
- Press Windows + I to open Settings
- Go to System → Sound
- Under "Output," check which device is shown as the current one
- Click the device you actually want to use and turn on "Set as default sound device"
Windows 10:
- Right-click the speaker icon and choose Open Sound settings
- Use the "Choose your output device" dropdown to select the correct device
- For more detailed options, click Sound Control Panel (listed under "Related Settings")
When multiple output devices are connected
If you have a monitor with built-in speakers, laptop speakers, an HDMI output, an external DAC, and a Bluetooth device all connected at once, Windows can easily pick the wrong one as the default.
In the Sound settings, review every listed device and set only one as the default. To prevent Windows from accidentally selecting an unused device in the future, you can disable the ones you don't need: right-click the speaker icon → Sounds (the legacy Sound control panel) → Playback tab → right-click an unwanted device → Disable.
Bluetooth headphone stereo vs. hands-free switching
When a Bluetooth headset is connected, Windows often registers it as two separate devices: one for stereo playback (high quality) and one for hands-free calls (microphone enabled, lower audio quality). If the hands-free device becomes the default, audio quality drops significantly or the device goes silent entirely.
In Sound settings, look for the device labeled Stereo or A2DP and set that one as the default output.
Check and update your sound driver
Check driver status in Device Manager
When a driver has a problem, Device Manager flags it with a yellow exclamation mark.
- Press Windows + X and choose Device Manager (or type "Device Manager" in the search bar)
- Expand Sound, video and game controllers
- Look for your audio device — common names include Realtek High Definition Audio and Intel Smart Sound Technology
- A yellow exclamation mark next to the device means the driver has a problem
If the device doesn't appear at all, go to the View menu and turn on "Show hidden devices", then look again.
Update the driver
You can update through Device Manager or download directly from the manufacturer.
Via Device Manager (Windows Update):
- Right-click your audio device and choose Update driver
- Select "Search automatically for drivers"
- If Windows finds a newer driver, it installs it automatically. If nothing is found, try the manual approach below.
Manual download from the manufacturer's website (recommended):
- Realtek-based systems: go to your PC manufacturer's support page (Dell, HP, Lenovo, ASUS, etc.), enter your model and OS, and download the audio driver from there
- Intel HD Audio: the Intel support site offers the latest driver for Intel audio controllers
After running the installer, restart your PC and test whether audio is restored.
Uninstall and reinstall the driver
If the driver is corrupted, a fresh reinstall is more effective than an update.
- Right-click your audio device in Device Manager and choose "Uninstall device"
- If you see a checkbox for "Delete the driver software for this device," check it
- Click Uninstall and restart the PC
- Windows will automatically reinstall a driver on restart. If it doesn't, open Device Manager, go to the Action menu, and click "Scan for hardware changes"
If the auto-installed driver is outdated, follow the manual download steps above to install the latest version from the manufacturer.
Run the Windows audio troubleshooter
Launching the troubleshooter on Windows 11
Windows includes a built-in audio troubleshooter that can automatically detect and fix simple problems. It's worth running before diving deeper into manual fixes.
- Press Windows + I to open Settings
- Go to System → Troubleshoot → Other troubleshooters
- Find "Playing Audio" in the list and click Run
- Wait for the diagnostic to finish and follow any instructions it provides
Launching the troubleshooter on Windows 10
- Go to Settings → Update & Security → Troubleshoot
- Click "Additional troubleshooters"
- Select "Playing Audio" and click "Run the troubleshooter"
Alternatively, right-click the speaker icon in the taskbar and choose "Troubleshoot sound problems" — that's the quickest way to launch it.
Reading the troubleshooter results
If the troubleshooter reports "Problems found, but some could not be fixed," check the error message it shows. Here's what to do for the most common results:
| Troubleshooter result | Next step |
|---|---|
| Audio service is not running | Restart the Windows Audio service manually (see the next section) |
| No audio device found | Reinstall the driver; check Device Manager for errors |
| No default audio device is set | Go to Settings → Sound and select an output device |
| No problems detected (but still no sound) | Restart the audio service → reinstall the driver → check hardware |
Restart the Windows Audio service
Opening services.msc
Windows audio is powered by two background services: Windows Audio and Windows Audio Endpoint Builder. If either stops or crashes, you lose all sound. Use services.msc to manage them directly.
- Press Windows + R to open the Run dialog
- Type services.msc and click OK
- The Services window opens with an alphabetical list of all Windows services
Restarting Windows Audio and Windows Audio Endpoint Builder
- Scroll to Windows Audio in the list
- Right-click it and choose Restart. If Restart is grayed out, choose Start instead
- Do the same for Windows Audio Endpoint Builder
- Test your audio
For best results, restart them in this order: Windows Audio Endpoint Builder first, then Windows Audio. This respects the dependency between the two services.
If the service is set to Disabled
If the startup type shows Disabled, the service will stop again immediately after you start it.
- Double-click the service to open its Properties
- Change the Startup type to Automatic
- Click Start to start the service now
- Click OK and restart the PC
Keep in mind that Windows Audio depends on other services such as Remote Procedure Call. If a dependency is stopped, the audio service can't start either. Check the service's Properties → Dependencies tab if the problem persists.
Sound missing in one specific app
Check the app's volume in the Volume Mixer
If Chrome, Zoom, a game, or any other specific app is silent while everything else works, check whether that app's volume is muted in the Volume Mixer.
- Right-click the speaker icon and choose Open Volume Mixer
- Confirm the app appears in the list. (It only shows up while the app is running and actively playing audio.)
- If the slider is at zero or the mute icon is active, correct it
On Windows 11, Settings → System → Sound → Volume Mixer offers the same controls and also lets you route each app to a different output device.
Check in-app audio settings
Many applications have their own audio configuration that can override the Windows default:
- Zoom: Settings → Audio → check the Speaker output device. Use "Test Speaker" to verify it works
- Google Chrome: check whether the site itself is muted — click the lock icon (or info icon) in the address bar → Site settings → Sound
- Steam (games): check the in-game volume settings as well as the Steam overlay audio options
- Discord: User Settings → Voice & Video → check the Output Device
Resolve exclusive mode conflicts
When exclusive mode is enabled, an application can claim sole ownership of the audio device and block all other apps from producing sound. This is common with DAWs (digital audio workstations) and some games.
- Right-click the speaker icon and choose Sounds (the legacy Sound control panel)
- On the Playback tab, double-click the device you're using to open its Properties
- Click the Advanced tab
- Uncheck "Allow applications to take exclusive control of this device"
- Click OK
No sound over HDMI or Bluetooth
Switching the output device for HDMI
Windows should automatically switch the default audio output to the HDMI device when you connect a monitor or TV, but it doesn't always do so reliably.
- Right-click the speaker icon and choose Sounds
- On the Playback tab, look for the HDMI or DisplayPort output (it may show your monitor's or TV's brand name)
- If you don't see it, right-click an empty area of the list and enable both "Show Disabled Devices" and "Show Disconnected Devices"
- Right-click the HDMI device and choose "Set as Default Device"
If no HDMI audio device appears at all, the graphics driver (NVIDIA, AMD, or Intel) may not include the audio component. Try updating your graphics driver to the latest version.
Re-pairing a Bluetooth headphone or speaker
An unstable Bluetooth connection can cause audio to cut out or stop entirely. Re-pairing often resolves it.
- Go to Settings → Bluetooth & devices (Windows 11) or Settings → Devices → Bluetooth & other devices (Windows 10)
- Find the problematic device, click it, and choose Remove device
- Put the Bluetooth device back into pairing mode
- Click Add device and pair it again
- After pairing, go to Settings → Sound and set it as the default output
Bluetooth A2DP vs. HFP profile switching
When a Bluetooth headset has a built-in microphone, Windows uses two separate Bluetooth profiles: A2DP (high-quality stereo playback) and HFP (hands-free profile, used for calls — lower audio quality). Opening an app that uses the microphone, such as Zoom, can trigger a switch to HFP, which sometimes results in noticeably worse audio or outright silence.
Ways to address this:
- In the Volume Mixer or Settings → Sound, explicitly set the stereo (A2DP) version of the device as the default output
- In Zoom (or other communication apps), change the microphone input to the PC's built-in microphone — this prevents the app from triggering the HFP switch
- On Windows 11 24H2, devices that support Bluetooth LE Audio avoid this problem entirely
Rule out a hardware problem
Try a different pair of headphones or speakers
If none of the software fixes have worked, it's time to consider whether the hardware itself is at fault. The simplest test is to plug a different pair of headphones or speakers into the PC.
- The substitute device plays audio → your original headphones or speakers are faulty. Replace them.
- The substitute device is also silent → the problem is with the PC's audio output port or sound card
If you're using a 3.5 mm jack, dust or debris inside the port can cause a poor connection. Try blowing it out with compressed air, then plug in again.
Test on another PC
Plug your headphones or speakers into a different PC or smartphone to see whether they produce sound.
- Silent on the other device too → the headphones or speakers are broken
- Work fine on the other device → the problem is specific to the original PC's sound card, audio port, or driver. Professional repair may be needed.
On a laptop where both the built-in speakers and headphones are completely silent, the most likely culprit is a failed onboard audio controller or a motherboard issue. Contact the manufacturer's support team.
Known issues after a Windows update
When silence starts right after an update
It's well documented that Windows feature updates and monthly quality updates can sometimes break audio. The usual culprits are a driver being silently overwritten or audio settings being reset by the update process.
After an update, check the following:
- Has the default output device in Settings → Sound been reset to something unexpected?
- Does Device Manager show an error flag on the audio device?
- Does Windows Update history show a recently installed driver update for audio?
Rolling back the driver to a previous version
If the update installed a new driver that's causing the problem, you can roll back to the previous version.
- In Device Manager, right-click the audio device and choose Properties
- Click the Driver tab
- If "Roll Back Driver" is available (not grayed out), click it
- Select a reason and click Yes
- Restart the PC and test
If "Roll Back Driver" is grayed out, Windows no longer has the previous version on file. In that case, download an older driver version directly from the PC manufacturer's support page and install it manually.
To prevent Windows from auto-updating the driver again, users on Windows 10 Pro or Windows 11 Pro can use the Group Policy Editor (gpedit.msc) to configure Computer Configuration → Administrative Templates → Windows Components → Windows Update → "Do not include drivers with Windows Updates".
Frequently asked questions
A reboot fixed it — but the problem keeps coming back
If audio returns after a restart but the silence recurs, the most likely explanation is a Windows Audio service crash or a single app repeatedly claiming exclusive control of the audio device. Open Event Viewer (eventvwr.msc), navigate to Windows Logs → System, and look for errors related to Windows Audio. In most recurring cases, a clean reinstall of the sound driver resolves the underlying issue permanently.
Realtek audio device disappeared from Device Manager
If the Realtek device is gone from Device Manager entirely, either onboard audio has been disabled in the BIOS, or the driver was uninstalled and not automatically reinstalled. First, restart the PC and try Action → Scan for hardware changes in Device Manager. If the device still doesn't appear, download the driver from the Realtek website or your PC manufacturer's support page and install it manually.
Headphones are plugged in but sound still comes from the built-in speakers
This usually means the jack detection feature isn't working correctly. Open the Realtek Audio Control (accessible from the notification area or Control Panel), find the jack information section, and check whether the connected port is recognized as "Headphones." If it isn't, try reinstalling the Realtek driver.
No sound in Zoom but everything else works
When only Zoom is silent, check two things: the output device in Zoom's own audio settings and whether Zoom is muted in the Windows Volume Mixer. In Zoom Settings → Audio, if the speaker output is set to a specific device (rather than "Same as System"), changing the Windows default won't affect Zoom. Also note that Zoom's "Original Sound" feature can conflict with other audio settings in some configurations.
Could the BIOS have audio disabled?
It's uncommon, but it does happen — especially on custom-built PCs or systems where someone previously changed BIOS settings. Press F2, Del, or F10 (varies by manufacturer) immediately after powering on to enter the BIOS/UEFI. Look in the Advanced or Integrated Peripherals section for an option labeled "HD Audio Controller" or "Onboard Audio" and make sure it's set to Enabled. Save and exit to apply the change.
Summary: step-by-step checklist
When Windows has no sound, work through these steps in order — most cases are resolved within the first three.
- Mute and volume: check the taskbar speaker icon, the physical mute key on your keyboard, and the Volume Mixer
- Output device: go to Settings → Sound and confirm the correct device is set as default
- Run the troubleshooter: right-click the speaker icon → Troubleshoot sound problems (or go to Settings → System → Troubleshoot → Playing Audio)
- Restart the audio service: open services.msc and restart Windows Audio Endpoint Builder, then Windows Audio
- Update or reinstall the driver: uninstall the device in Device Manager and let Windows reinstall it, or download the latest driver from the PC manufacturer's website
- App-specific issue: check the Volume Mixer, in-app audio settings, and disable exclusive mode if needed
- HDMI or Bluetooth: set the correct output device, re-pair the Bluetooth device, and check for A2DP vs. HFP profile issues
- Hardware check: test with different headphones and on a different PC to isolate whether the problem is in the hardware
Steps 1 through 3 resolve the problem in the overwhelming majority of cases. If silence started right after a Windows update, try rolling back the driver (a variant of step 5) before going further. If you've worked through all eight steps without success, the onboard audio controller or a physical port may have failed — at that point, reaching out to the manufacturer's support is the right move.
For other Windows troubleshooting topics, see the Windows Troubleshooting Guide | Solutions by Symptom.
