@JohnC_21 So this morning I went to watch a video and listen with headphones on Media Player. It used to be that all I had to do was plug the headphones into the same place I plug the speakers into and they both would work. But nothing was coming out of the headphones.
So I right-clicked on the audio icon on the toolbar, chose Playback Devices, and changed the default from the Speakers icon to the Headphones icon. And it worked. Forgot all about it until I did the Internet Explorer test you suggested and sound came out of the speakers!! They worked with Firefox, too.
The problem the whole time was that because I was using speakers, I thought the default had to be Speakers. I don't know what the hell the Speakers icon is supposed to represent, but it didn't allow my speakers to work on the internet, nor did it allow the headphones to work with Media Player. But when you choose Headphones as the default option, they both work with both.
I'll believe it's all fixed when I can do either a few times in a row without having to go back and change the default. How the whole thing went wrong in the first place is a complete and total mystery.
Thank you so much for your time and your help, I sincerely appreciate it. Sydney
@jhayz Thank you for your advice, but it was way above my pay grade. I googled orb and came up with so many different results that I didn't know which to choose and couldn't even tell what it's supposed to do. Fortunately, JohnC_21 enabled me to realize what was going on and I hope it stays fixed! Thank you again. Sydney