1. First, check whether the service has disabled the device. Start-Run-Service. msc Find the windows audio item and see if the (startup type) on the right is disabled. If so, right-click the top and click Properties. When you see the (startup type) inside, you can select (automatic) and then close it after confirmation. 2. If it is not disabled. This may be a problem with the sound card driver. Check, start-control panel-audio and audio equipment, and see if the volume and audio inside are inoperable, that is, gray and cannot be set. This may be a problem with the sound card driver. You can reinstall the sound card driver. Try it. You can use the super rabbit to open (update the driver) to check the sound card driver. Remove the original sound card driver before updating, remember the driver model, and then update!