Have a new Dell Inspiron with Win7 Home Premium and IE 9. The sound plays on most videos i.e. YouTube and others. The problem arises if you go to for example, MSN click on a news video, the advertisment plays with sound, but when the actual news item plays, o sound for the voice. I have tried in Google news and have the same problem. The client has a program he needs to learn which is web based video and the sound does not work.

Have checked sound card, fine, have made sure appropriate addons are enabled, and even reset IE 9. Not sure where to go from here. Any help appreciated.