Restore your PC from a system restore point: If rolling back your audio driver didn't work or wasn't an option, you can try to restore your PC from a system restore point. Read and follow the instructions and then select Yes if you want to roll back your audio driver. Select the Driver tab, then select Roll Back Driver. Select and hold (or right-click) the listing for your sound card or audio device, then select Properties. If your audio was working before you ran Windows Update and now isn’t working, try rolling back your audio driver. If you have audio issues after installing updates The following is an example of a driver download page for a sound device manufacturer. If these steps didn't solve your audio issue, visit your device manufacturer’s website and install the most recent audio/sound drivers for your device. Select the audio device whose driver you want to update, select Next, and then follow the instructions to install it. Select and hold (or right-click) the listing for your sound card or audio device, then select Update driver > Browse my computer for drivers > Let me pick from a list of available drivers on my computer. To use the generic audio driver that comes with Windows: If those options didn’t work, try using the generic audio driver that comes with Windows.

To restart, select Start > Power > Restart. This restart will automatically prompt your PC to reinstall your audio driver. Note: Be sure to save your documents and any other current work before you restart. Select and hold (or right-click) the listing for your sound card or audio device, select Uninstall device, select the Attempt to remove the driver for this device check box, and then select Uninstall. If that doesn't work, try uninstalling your audio driver.

If Windows doesn't find a new driver, look for one on the device manufacturer's website and follow those instructions. Follow the instructions to complete the update. Select and hold (or right-click) the listing for your sound card or audio device, such as headphones or speakers, select Update driver, then select Search automatically for drivers. Select the arrow next to Sound, video and game controllers to expand it. In the search box on the taskbar, type device manager, then select it from the results. To update your audio driver automatically: If you're having audio issues after installing updates, try rolling back your audio driver. If that doesn't work, try using the generic audio driver that comes with Windows. If that doesn't work, try uninstalling the audio driver (it will reinstall automatically). Make sure your audio driver is up to date and update it if needed. Hardware problems can be caused by outdated or malfunctioning drivers.

No sound after downloading windows 8.1