How to Fix No Sound on a Windows Computer

Published 2026-10-15 · Marion Remote Fix

Sound was working yesterday and now it is gone — no system sounds, no audio from any application, complete silence from the speakers or headphones. Or sound disappeared after a Windows Update, after connecting a new monitor, or after plugging in and removing a headset. No sound on Windows is almost always a configuration issue (wrong output device selected, a muted channel, or a disabled service) or a driver problem. Running through the fixes in order from simplest to most involved catches the cause quickly.

Check 1: Volume and mute status

Start with the most basic causes before moving to advanced fixes:

  • System volume: Click the speaker icon in the system tray (bottom-right corner). Check that the volume slider is not at zero and the speaker is not muted (an X appears on the speaker icon when muted). Click to unmute if needed
  • Volume Mixer: Right-click the speaker icon and select Open Volume Mixer. Each running application has its own volume slider — a single muted app has no sound while everything else works. Check that all sliders are up and nothing is muted
  • Hardware volume: External speakers have physical volume knobs. Keyboards have volume keys (often Fn-key combinations on laptops). Monitors with speakers have volume in their on-screen display menu. Check every point in the chain
  • Cable connections: For external speakers, verify the audio cable is firmly plugged into the correct port — the green 3.5mm jack for analog, or check that USB or HDMI is fully seated. A cable that is slightly loose can appear connected but not make proper contact

Check 2: Output device selection

This is one of the most common causes of sudden audio loss. Windows sends audio to whichever device is set as the default output. When a new device is connected (an HDMI monitor, a Bluetooth headset, a USB headset), Windows often switches the default output to the new device — and when that device is disconnected, it may not switch back:

  1. Right-click the speaker icon in the system tray, select Sound settings
  2. Under Output, check which device is selected in the dropdown
  3. If the wrong device is selected (a monitor that has no speakers, a disconnected Bluetooth headset, a virtual audio device), change it to your speakers or headphones
  4. Click the arrow next to the device to expand settings and make sure the volume slider is up

Common scenarios where the output device gets switched:

  • HDMI or DisplayPort monitor connected: The monitor appears as a separate audio output device. If selected as default, audio goes to the monitor — which may have no speakers, may have speakers you do not use, or may have its own volume turned down
  • Bluetooth headset paired but off: Windows may still try to send audio to a Bluetooth device that is turned off or out of range, resulting in silence
  • Gaming headset software: Some gaming headsets (SteelSeries, HyperX, Corsair, Razer) install virtual audio devices. If the headset is unplugged but the virtual device is still the default, there is no audio

Check 3: Windows Audio service

The Windows Audio service must be running for sound to work. A crashed or disabled service means no audio from any source:

  1. Press Windows+R, type services.msc, press Enter
  2. Find Windows Audio in the list
  3. The Status column should say Running and the Startup Type should say Automatic
  4. If it is stopped: right-click, select Start
  5. Also check Windows Audio Endpoint Builder — this service must also be running
  6. If either service is set to Disabled or Manual: right-click, Properties, change Startup type to Automatic, click Apply, then Start

Third-party system optimization tools sometimes disable Windows services in an attempt to improve performance. If the audio service was disabled after running an optimizer, that is the cause.

Check 4: Audio driver

A corrupted, outdated, or incompatible audio driver is the most common cause of audio loss that persists through the basic checks:

Restart the audio driver quickly

Press Windows+Ctrl+Shift+B — this restarts the graphics and audio drivers without rebooting. The screen flashes briefly. Test audio immediately after. This is a quick fix for a driver that has stopped responding but is not corrupted.

Reinstall the driver

  1. Open Device Manager (Windows+X, select Device Manager)
  2. Expand Sound, video and game controllers
  3. Right-click your audio device (Realtek, Intel Smart Sound Technology, or your specific hardware name)
  4. Select Uninstall device. Check the Remove driver software checkbox if available
  5. Restart the computer — Windows installs a default driver automatically

Install the manufacturer's driver

If the default driver does not restore audio, download the driver directly from the hardware manufacturer:

  • For laptops: go to the manufacturer's support page (Dell, HP, Lenovo, ASUS) and download the audio driver for your specific model
  • For desktops: go to the motherboard manufacturer's support page and download the audio driver for your board model. Find your board model with wmic baseboard get product in Command Prompt
  • For dedicated sound cards or USB audio interfaces: download from the manufacturer's website

Roll back after update

If audio stopped after a Windows Update: Device Manager, right-click your audio device, Properties, Driver tab, Roll Back Driver. Windows Updates sometimes replace working manufacturer drivers with generic ones that do not work correctly with all hardware.

Check 5: Audio enhancements and spatial sound

Audio enhancement features can cause no-sound conditions when they malfunction:

  1. Right-click the speaker icon, select Sound settings, click your output device
  2. Scroll to Audio enhancements and set to Off
  3. Under Spatial sound, set to Off
  4. Test audio after disabling each one

Third-party audio software (Realtek Audio Console, Nahimic, Dolby Atmos for headphones, DTS Audio Processing, Sonic Studio) adds processing layers. If one of these is misconfigured or crashes, it can intercept and block audio. Check the system tray for these applications and try disabling or exiting them.

Check 6: Hidden or disabled playback devices

Audio devices can be disabled in Windows without being removed:

  1. Right-click the speaker icon, select Sound settings, scroll down to More sound settings
  2. In the Playback tab, right-click any empty area
  3. Check both Show Disabled Devices and Show Disconnected Devices
  4. If your speakers appear grayed out, right-click them and select Enable
  5. Right-click again and select Set as Default Device

Check 7: Audio format compatibility

Some audio hardware does not support all sample rate and bit depth combinations:

  1. Open Sound settings, More sound settings
  2. Right-click your playback device, select Properties
  3. Go to the Advanced tab
  4. Change Default Format to 16 bit, 44100 Hz (CD Quality) — the most universally compatible setting
  5. Click Test to play a test tone
  6. If the test tone plays, apply the setting and test with actual audio content

Check 8: System File Checker

Corrupted Windows system files can break audio functionality:

  1. Open Command Prompt as administrator (search cmd, right-click, Run as administrator)
  2. Run sfc /scannow
  3. If it finds and repairs files, restart and test audio
  4. If SFC reports it could not fix all files, run DISM /Online /Cleanup-Image /RestoreHealth first, then run SFC again

When hardware is failing

If every software fix fails:

  • Test with different output hardware: Try a different pair of speakers or headphones. If nothing produces sound through the audio jack, the jack or the onboard audio chip may be faulty
  • Try USB audio: A USB audio adapter (under $10) bypasses the onboard audio entirely. If sound works through USB audio, the onboard audio hardware has failed. The USB adapter works as a permanent workaround
  • Check the audio jack: On laptops, the 3.5mm jack connects via a small board or directly to the motherboard. Physical damage to the jack (from yanking headphones, drops, or liquid exposure) can break the audio output. The jack may appear physically fine but have internal damage to the contacts

Remote audio troubleshooting

Marion Remote Fix diagnoses audio problems remotely — checking output devices, drivers, services, and audio settings during the remote session to identify the exact cause and restore sound.

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