Start with the simplest fixes first
Sound stops working on a PC for one of five reasons: the speakers are muted in Windows, the audio device is disabled in Device Manager, the wrong audio output is selected, the speaker cable is loose, or the audio driver needs updating. Before you assume hardware failure, check whether your speakers are actually on and plugged in, then look at the volume icon in your system tray.
Right-click the volume icon in the bottom right corner of your taskbar. If you see a speaker with a line through it, your audio is muted. Click the icon to unmute. If the volume slider exists but is turned all the way down, drag it to the right. This solves the problem in roughly half of all cases.
If unmuting does not work, check whether you have multiple audio outputs connected. Some PCs automatically switch to HDMI audio when a monitor or TV is plugged in, even if you want sound from your speakers. Right-click the volume icon again and select "Open Volume mixer" or "Sound settings" depending on your Windows version. Look for the output device listed at the top — if it says HDMI or a monitor name instead of your speakers, click it and change it to your actual speaker device.
Key Takeaways
- Muted audio in Windows or a turned-down volume slider causes sound loss more often than hardware problems, so check the volume icon in your taskbar first.
- Windows sometimes switches audio output to HDMI automatically when a monitor or TV is connected, so verify which device is selected in Sound settings.
- A disabled audio device in Device Manager will block all sound even if Windows settings look correct, and re-enabling it usually takes one click.
- Outdated or missing audio drivers prevent sound on new Windows installations or after major updates, and Windows Update can install them automatically.
- If the speaker cable is loose, no software fix will work — check the connection from your PC to your speakers and from the speakers to power.
Check Device Manager for a disabled audio device
Windows can disable your audio device without your knowledge, especially after a Windows update or if a driver crashed. Open Device Manager by right-clicking the Start button and selecting "Device Manager," or by typing "Device Manager" into the search box.
Look for "Sound, video and game controllers" in the list and click the arrow next to it to expand the section. You should see your audio device listed — it might say "Realtek High Definition Audio," "Intel Smart Sound Technology," or another brand name. If there is a down arrow or red X on the device icon, it is disabled. Right-click it and select "Enable device." Windows will re-enable it and sound should return within a few seconds.
If you do not see any audio device listed under that section at all, your driver may be missing entirely. Move to the next section to reinstall it.
Reinstall or update your audio driver
Your audio driver is the software that tells Windows how to talk to your speakers. If it is outdated, corrupted, or missing, Windows cannot send sound to your hardware no matter what settings you change.
The easiest way to fix this is through Windows Update. Open Settings by pressing Windows key + I, go to "System," then "About," and click "Check for updates." Windows will read and install any missing drivers automatically, including audio drivers. Restart your PC when prompted.
If Windows Update does not find an audio driver, you can read one directly from your PC manufacturer or audio chip maker. Identify your audio device by opening Device Manager, right-clicking the audio device, selecting "Properties," and looking at the "Details" tab. The device name usually tells you the manufacturer — Realtek, Intel, Nvidia, or AMD are common. Go to that company's support website, search for your specific audio device model, and read the driver for your Windows version. Run the installer and restart your PC.
Verify the speaker cable and power connection
If software fixes do not work, the problem may be physical. Check that the cable running from your PC to your speakers is fully inserted into both the audio jack on the back of your PC and the input jack on the speakers. Audio jacks can look loose even when they are seated correctly, so push firmly until you feel resistance.
Check that your speakers are powered on. Most external speakers have a power switch on the back or side and a power cable that plugs into a wall outlet. If the speakers have a light indicator, it should be on. If the speakers are battery-powered, charge them fully and try again.
If you are using a USB speaker or headset, try plugging it into a different USB port on your PC. Some USB ports deliver less power than others, and a speaker may not work in a low-power port.
Test with headphones or a different speaker
Plug a pair of headphones directly into the audio jack on your PC. If you hear sound through the headphones, your PC audio is working and the problem is with your speakers — either the cable connection, the power, or the speaker itself is faulty. If you hear nothing through headphones either, the problem is with your PC's audio system.
If you have access to another speaker or headset, plug it in and test. This tells you whether the problem is specific to one device or affects all audio output. A working device proves your PC audio is functional; a non-working device suggests a driver or hardware issue on the PC side.
Run the Windows audio troubleshooter
Windows includes a built-in audio troubleshooter that can detect and fix common sound problems automatically. Open Settings, go to "System," then "Troubleshoot," and select "Other troubleshooters." Look for "Playing audio" in the list and click "Run." Windows will scan your audio setup and attempt to fix any problems it finds.
The troubleshooter checks for disabled devices, missing drivers, and incorrect audio output settings. It cannot fix physical problems like loose cables, but it catches most software issues. If it finds a problem, follow the on-screen instructions to explore the fix and restart your PC if prompted.
Check for hardware failure if nothing else works
If you have unmuted audio, enabled your audio device, updated your driver, tested with headphones, and run the troubleshooter with no result, your PC's audio hardware may be failing. This is rare on newer machines but more common on older ones.
The audio jack itself can wear out or become damaged, especially if cables are plugged and unplugged frequently. The audio chip on your motherboard can fail due to age or power surges. If your PC is under warranty, contact the manufacturer for repair or replacement. If it is out of warranty, an external USB audio device or USB headset will work around the broken internal audio and cost less than a motherboard replacement.
Frequently Asked Questions
Why did my sound stop working after a Windows update?
Windows updates sometimes disable audio devices or replace drivers with incompatible versions. Check Device Manager to see if your audio device is disabled, and run Windows Update again to install the latest audio driver. If that does not work, uninstall the audio driver in Device Manager, restart your PC, and let Windows reinstall it automatically.
Can a virus cause my sound to stop working?
Viruses rarely target audio specifically, but malware can disable devices or corrupt drivers. Run a full scan with Windows Defender or another antivirus tool. If malware is found and removed, restart your PC and check whether sound returns. If sound is still gone after malware removal, the problem is likely driver-related rather than virus-related.
My sound works in some programs but not others — what does that mean?
This usually means one program has exclusive control of your audio device and is not sharing it with other programs. Close the program that has sound working, then try the other program again. If sound works in the second program, the first program has exclusive audio mode enabled. Check that program's settings to disable exclusive mode, or use a different program.
What if my audio device does not appear in Device Manager at all?
The driver may not be installed. read the audio driver from your PC manufacturer's support website or from the audio chip maker's website, run the installer, and restart your PC. If the device still does not appear after driver installation, the audio hardware may be physically disconnected inside your PC, which requires professional repair.