Best Fix: No Audio Output Device is installed
When the sound icon in your task bar has a red x on it (as illustrated above), your computer won’t play any sound.
This is usually caused by one of two problems: either Windows has disabled your audio device or your PC doesn’t have the latest correct device drivers installed, and Windows therefore can’t ‘talk’ to the device.
If you see No Audio Output Device is installed when you hover your mouse over the the sound icon, your audio problem is probably caused by one of these issues, and there are three repair methods you can try that have helped other users. You may not need to try them all; just start at the top of the list and work your way down.
1: Re-enable the device
2: Manually uninstall & reinstall the device driver
3: Automatically update your audio device drivers
To fix the problem, follow these steps (Steps below are for your reference. The specific steps in different system versions may be different. ):
1) On your keyboard, press the Windows logo key and R at the same time to invoke a Run command. Type devmgmt.msc in the run box and click on OK button.
2) Locate the Sound, video and game controllers category in the list.
If you don’t see this category in your list, continue with step 2a) below. Otherwise skip to step 3.
3) Expand the Sound, video and game controllers category, and right-click on your audio device. Click Enable in the pop up menu. (If the device is already enabled, skip to Method 2 below.)
1) Still in Device Manager, once again expand Sound, video and game controllers, right-click on your audio device, and click Uninstall to uninstall the driver.
2) Restart your PC. After restarting, Windows should automatically re-install the sound driver. Assuming it installs the latest correct driver, this may resolve the problem.
Your sound problem is probably being caused by driver issues. The steps above may resolve it, but if they don’t, or you’re not confident playing around with drivers manually, you can do it automatically with Driver Easy.
Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.
You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):
1) Download and install Driver Easy.
2) Run Driver Easy and click Scan Now. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to a flagged audio driver to automatically download and install the correct version of this driver (you can do this with the FREE version). Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).