Hi DanU
Thanks for the suggestion, the version of Nero 6 that I have is the OEM one and it seems to consist of just burning software - I have installed-reinstalled Nero a dozen times GRrr.. Each time I install it the sound output on Windows Media Player is killed, otherwise it (WMP) operates normal - Uninstall Nero and I have sound again!
Do you think it could it be a registery entry problem? Really desperate! :-(