Hey guys, I was actually reading all your comments in hopes of finding a solution myself. I had the same problem most of you have or had.
I'm running a Vista Home Premium 6-bit laptop/notebook, and my sound drivers/cards are "Avnex Virtal Audio Device" and "Conexant High Definition SmartAudio 221"
There are other two which I found to be useless so I won't name them.
My laptop (gateway) was working perfectly fine until I plugged in a pair of headphones, then all my sound completely went away. I was going insane and thought about unistalling my sound cards and installing new ones, but I'm not good with computers and was going to mess it all up worse, so I decided not to.
Anyway, I couldn't find an answer, and non of yours seemed to work, so I fooled around with them, and finally ended up Making the Conexant speaker the default speakers.
I did this by going to Control Panel > Sound >
And you'll see the speakers there. I had Avnex as my default, so I pressed on it, And pressed Properties. Then I went through all the taps and tested everyone. Non seemed to work. So I went to Conexant and did the same thing. The test worked and I heard some beeping sounds.
My Fiancee next to me asked me why Avnex was the default, and I said I didn't know, it was that way before I did anything, so I got the idea to make Conexant the default drivers and it worked. I started getting the beeping sounds when I get a pop up or something, so I tried my Itunes and WALAH! :D
I thought I had burned down my speakers or something because (being a huge fan of downloads) I have kept my laptop on 3 days in a row now. (the file is huge and my internet is BLAH. *cough* Comcast *cough*) and my laptop has gotten BURNING underneath.
Anyway, hoped I helped. :)
I'm running windows 7. All of my drivers are up to date. I've tried setting default audio disabling and re-enabling it, and a few other things I can't recall atm. Nothing seems to work. However when I look into the playback options it says that no jack information is found for my default speakers. I'm wondering if that could be the problem? Any help you could give would be greatly appreciated. Thanks
YOU SAVED MY LIFE!
Thank you soo much <3 :D