Esther's sound in her computer suddenly stopped working. Esther should first check the speaker cables to be sure they are still seated. Unplug and plug them back in. Esther can also see what happens when she plugs in headphones. If that works, then it's not the sound driver. She should also make sure her speakers are turned on in the computer's settings. She might even try a simple reboot. If she can't get sound after checking all of those things, it may need to be looked at by a technician, or she may have to reinstall Windows.