This morning I downloaded many updates from Microsoft, including a huge Navidia file. After the updates I restarted the computer and then started downloading some videos from youtube. At this time the sound was working just fine. I didn't listen to or watch any videos or music through the day. I just tried to listen to a video on youtube, and there is no sound. The speakers are getting power as the light is on, however, when I clicked on the speaker in the task bar to see if it was turned off, it was all the way up, and there was an icon of earphones on the popup. I double clicked on the earphones and it brought up a small window where I changed the icon to what looked like a speaker to me, but I still can't get any sound. I tried restarting the computer as sometimes, for whatever weird reason, that does fix some problems, but that didn't work either. I don't know if those downloads (233MB) conflicted with the sound card driver or not and I have no idea how to get an updated driver, if that's what it needs? Does anyone have any suggestions as to what the problem could possibly be?