It wasn't the speakers. After installing new ones, it still didn't work. i checked help & support, ran the troubleshooter and found out that my audio mixer wasn't working. Reinstalled that and now I have all the sound that I want. I'm going to keep the new speakers, though - they're better than the old ones.
I figured out what caused the problem. In order to load a photo, on a dating website, I had to download a Java update. This not only killed my audio driver, I was unable to open games on another site. Once I uninstalled the Java update and reinstalled the audio mixer, I had no problems.