Next to my speaker icon is a red X. "No audio output device is installed" is what it tells me. Device Manager lists RealTek High Definition Audio under Sound, Video and Game Controllers.
I haven't made any changes to any of my laptop's hardware.
What's up with this? How do I get my sound back?
I'm a novice at this so you'll have to spell things out!

Any help will be appreciated!
Thanks,
Lisa