problem is that gamespy is using your sound card when you are launching and halflife cant take over the sound card while gamespy is using it because your sound drivers does not allow it. Quick fix to that is just disable gamespy from making any sounds in the gamespy options or preferances. Just clear out the sound feild in the gamespy options or just move the gamespy sound directory.
Thats why i like using microsoft's sound drivers, it allows you to run multiple instances of programs that use sounds.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS