About three weeks ago, I noticed that when I play videos online, the sound sounds horribly distorted. I don't even know how to describe it. It's echoey and reverberates. I called my DSL service provider and they said the internet connection is fine. They suggested I uninstall and reinstall my brower (in my case mozilla firefox) which I DID but to no avail. I'm not sure if I have an add-on or a virus that's making playback difficult. I DID have a trojan on my comp but I cleaned it. I'm not sure if that might still be a problem. Has anyone else experienced this problem? Please let me know and if you have any success stories, too. Thank you.