I have seen the thread you attached
I loaded all the updates suggested but it did not solve the problem
Sony are denying all knowledge of this problem and Adobe are saying they no longer support PE3
Do you get audio if you burn to folder and play the resultant DVD folder in a media player? If so an option would be to burn to disc with a 3rd party burning software. Did you get one with your Vaio?
I got round it by Exporting a MPEG to file and then burning from there
But not very satisfactory
Thanks for your input