Not able to listen songs on youtube videos

Hello,

No Sound on internet
I am trying to get sound on internet explorer,Firefox, Google chrome again. I can listen to I try to hear a video or hear a song on you tube, mtv.com, my space, or any other kind of website it does not work please help. Thanks in advance.


i have a regedit version 5.1.2600 so those missing.reg file which is given by u on your blog.. is it work in this version also??